Like a rope that's not slack (4)
I believe the answer is:
taut
(Other definitions for taut that I've seen before include "Without slack" , "Fully stretched" , "Held in tension" , "Tightly drawn" , "Tense, stretched tight" .)
I believe the answer is:
taut
(Other definitions for taut that I've seen before include "Without slack" , "Fully stretched" , "Held in tension" , "Tightly drawn" , "Tense, stretched tight" .)