Concise and controlled, 4 letters
Emotionally strained, 4 letters
Good descriptor for a thriller, 4 letters
Having little slack, 4 letters
Having no play, say, 4 letters
Like a circus high wire, 4 letters
Like a guitar string, 4 letters
Like a newly-installed fan belt, 4 letters
Like a trampoline's surface, 4 letters
Like a tug-of-war rope, 4 letters
Like a tuned drumhead, 4 letters
Like a tuned guitar string, 4 letters
Like a tuned piano string, 4 letters
Like a tuned string, 4 letters
Like concise writing, 4 letters
Like guitar strings, 4 letters
Like properly strung guitar strings, 4 letters
Like some nerves or ropes, 4 letters
Like violin strings, 4 letters
Near the breaking point, 4 letters
Not at all redundant, 4 letters
Reportedly provided training with no slack (4), 4 letters
Spy-movie review adjective, 4 letters
Stretched just short of the breaking point, 4 letters
Stretched tight, as a drum head, 4 letters
Stretched to the limit, 4 letters
Stretched to the max, 4 letters
Strung with tension, 4 letters
Subjected to great tension, 4 letters
Tight, as a drum skin, 4 letters
Very efficient, as a ship, 4 letters
What a good fan belt should be, 4 letters
Draw tighter, as a rope, 6 letters
Tense up, as muscles, 6 letters
Removes the slack from, 7 letters
Creating more tension, 6 letters
More tense, as rope, 6 letters
More tightly stretched, 6 letters
Having the least play, 7 letters
Showing maximal strain, 7 letters
Stretched to the limit, 7 letters
Stretched to the max, 7 letters
So as not to be loose, 6 letters
The physical condition of being stretched or strained, 8 letters
Lack of movement or room for movement, 8 letters
Identical word form, 5 letters
Large dark-colored food fish of the Atlantic coast of North America, 6 letters
North Atlantic food fish, also called blackfish, 7 letters
Rose is a rose is a rose., 9 letters
Needless repetition, 9 letters
(logic) a statement that is necessarily true, 9 letters
Audrey of The Da Vinci Code, 6 letters
Feature of a crab ready to molt?, 9 letters