- Tough hikes
- Tough hit for an infielder
- Tough hockey player
- Tough hole goal
- Tough husband wearing drag
- Tough in texture
- Tough in Tijuana
- Tough instrument for movers to move
- Tough issue to handle
- Tough it out
- Tough item to get upstairs, typically
- Tough Japanese dog
- Tough job
- Tough job for a beauty contest judge
- Tough job for a dry cleaner
- Tough job for a mover, maybe
- Tough jobs
- Tough Journey
- Tough journeys
- Tough kid to handle
- Tough kid to sit for
- Tough kid's dare
- Tough laundry problem
- Tough leather
- Tough looks
- Tough love rarity
- Tough luck
- Tough luck ... I don't care what you think
- Tough march
- Tough meat stuff
- tough membrane covering the upper part of the cerebellum
- tough more-or-less rigid protective covering of an animal or plant
- Tough mount to mount
- Tough mutt
- Tough navy guy
- Tough noogies
- Tough nut
- Tough nut to crack
- Tough nuts to crack
- Tough on melodists
- Tough on the ears
- Tough on the nose
- Tough on the tongue
- Tough on traveling, in a way
- Tough one
- Tough opponents
- Tough or "hot" place
- tough or aggressive person
- Tough out
- tough paperboard made from wood and wastepaper pulp: used for making boxes, etc
- Tough part when knitting a sock
- Tough period
- Tough period of the school year
- tough person
- Tough person to bargain with
- Tough person to get information from
- Tough person to tolerate
- Tough phrase for an interpreter
- Tough phrase for foreigners
- Tough pickup for some bowlers
- Tough pill to swallow
- Tough pills to swallow, at times
- Tough pitch to hit
- Tough place to be in
- Tough place to come out a winner
- Tough play for Derek Jeter
- Tough poker hand to beat
- Tough posers
- Tough position
- Tough predicament
- Tough problem
- Tough problem to face?
- Tough puff
- Tough punk
- Tough puzzle
- Tough puzzle, informally
- Tough puzzles
- Tough question
- Tough questioning (inf)
- Tough questions
- Tough request
- Tough riddle
- Tough rivals
- Tough road to hoe
- Tough row to ___
- Tough row to hoe
- Tough rubber?
- Tough ruler
- Tough shark
- Tough shot for a bowler
- Tough Situation
- Tough situation
- Tough situations
- Tough skin
- Tough skinned
- Tough sledding
- Tough slog
- Tough spot
- Tough spot for a golfer
- Tough spot for actor Walter?
- Tough spot for Daniel
- Tough spot to self-trim hair
- Tough spots
- Tough spots to be in ... or what 17-, 20-, 38- and 53-Across represent?
- Tough spots to be in  or what 17-, 20-, 38- and 53-Across represent?
- Tough spots to get out of
- Tough string
- tough stringy animal tissue found in meat
- Tough stuff
- Tough stuff in meat
- Tough stuff to walk through
- Tough syndicate
- Tough synthetic
- tough synthetic substance made from silicon and used in lubricants
- Tough tan twill
- Tough task
- Tough teammate to handle
- Tough test
- Tough test, as it were
- Tough test, informally
- Tough test, slangily
- Tough tests
- Tough tests of knowledge
- Tough thing to be in
- Tough thing to be put through
- Tough thing to be stuck in
- Tough thing to crack
- Tough thing to fill
- Tough thing to kick
- Tough thing to master at the Masters
- Tough thing to overcome
- Tough thing to run on
- Tough thing to swallow
- Tough things to kick
- Tough timber
- Tough time
- Tough time for Caesar
- Tough time for parents
- Tough time spent between jobs?
- Tough time to farm
- Tough times
- Tough tissue
- Tough to budge
- Tough to catch
- Tough to clean
- Tough to climb
- Tough to climb, in a way
- Tough to climb, perhaps
- Tough to comb
- Tough to crack
- Tough to cycle on
- Tough to dig into, as soil
- Tough to drive through
- Tough to endure
- Tough to fathom
- Tough to figure out
- Tough to find
- Tough to get ahold of
- Tough to get hold of
- Tough to get through
- Tough to get through to
- Tough to get up
- Tough to get your hands on
- Tough to grasp
- Tough to hear, as criticism
- Tough to hold
- Tough to knock out
- Tough to learn
- tough to masticate
- Tough to navigate
- Tough to outwit
- Tough to resolve
- Tough to root out
- Tough to see through
- Tough to solve
- Tough to sort out
- Tough to spot, probably
- Tough to squeeze through
- Tough to take
- Tough to titillate
- Tough to understand
- Tough toenails!
- Tough trek
- Tough trial
- Tough trials
- Tough trip
- Tough trip-takers
- Tough trips
- Tough turkey?
- Tough turns
- tough twill-weave cotton fabric
- Tough tyke to handle
- Tough type of exam
- Tough walk
- Tough watchdog
- Tough way to learn
- Tough way to swim
- tough white substance that forms the outer covering of the eyeball
- tough wiry grass
- Tough wood
- Tough work
- tough youth
- TOUGH youth (sl.)
- Tough-as-nails
- TOUGH-barked, fiber/fibre-yielding tree
- Tough-guy actor Ray
- Tough-guy actor Steve who would have fallen for anything?
- Tough-guy competition
- Tough-skinned creatures
- tough-skinned purple grapelike tropical fruit grown in Brazil
- Tough-sounding yarn?
- Tough-talking coach
- Tough-talking radio talk show host
- Tough-to-beat card
- Tough-to-get-out-of situation
- Tough-to-hit tennis shot
- Tough-to-ignore feeling
- Tough-to-make pool shot
- Tough-to-pass driver
- Tough-to-pass one
- Tough-to-please actress
- Tough-to-read writing
- Tough-to-remove stain
- Tough-to-sculpt part of some Roman statues
- Tough-to-win horse racing bet
- Tough-wooded conifer
- Tough, as a cop
- Tough, durable wood
- tough, elastic tissue; mostly converted to bone in adults
- Tough, fibrous tissue
- tough, leathery cloth
- Tough, uncompromising sort
- Tough, unsentimental type
- Tough's partner
- Tough's territory
- Toughen
- Toughen by exposure
- toughen by heat
- Toughen by heating, as glass
- Toughen or harden
- Toughen or harden (Var.)
- Toughen steel
- Toughen up
- Toughen using heat
- Toughen, as glass
- Toughen, as Glass Actor
- Toughen, as glass or steel
- Toughen, as to hardship
- Toughen,as steel
- Toughen: Var.