Answer:

taut

Answer	Crossword Clue
TAUT	Sans slack
TAUT	Lacking slack
TAUT	Like a bowstring

TAUT	Far from slack
TAUT	Gripping
TAUT	Having no slack
TAUT	Strung with tension
TAUT	Having little slack
TAUT	All wound up
TAUT	Sans any slack
TAUT	Free of slack

TAUT	Like a drumhead
TAUT	Stretched tightly
TAUT	Not slack
TAUT	Emotionally strained
TAUT	Without wrinkles
TAUT	Good descriptor for a thriller
TAUT	Without much give
TAUT	Like guitar strings, often

TAUT	Stretched to the max
TAUT	Lacking play
TAUT	Tense
TAUT	Tightly drawn
TAUT	Like a guitar string
TAUT	Stretched tight
TAUT	Without slack
TAUT	Drawn tight

TAUT	Stretched just short of the breaking point
TAUT	Tight
TAUT	Having no play
TAUT	Playless?
TAUT	Stiff
TAUT	Not at all droopy
TAUT	Stretched
TAUT	Like properly strung guitar strings

TAUT	High-strung
TAUT	Tightly stretched
TAUT	Like a tuned guitar string
TAUT	Like a circus high wire
TAUT	Stretched to the limit