Tense up (7)
I believe the answer is:
stiffen
(Other definitions for stiffen that I've seen before include "more severe" , "Make rigid or inflexible" , "Give strength to" , "Make unbending" , "Grow harder" .)
I believe the answer is:
stiffen
(Other definitions for stiffen that I've seen before include "more severe" , "Make rigid or inflexible" , "Give strength to" , "Make unbending" , "Grow harder" .)