(Of a muscle) become less tight and rigid (5)
I believe the answer is:
relax
(Other definitions for relax that I've seen before include "Take it easy, don't be so tense" , "Unwind, take it easy" , "Wind down" , "Moderate" , "Unbend" .)
I believe the answer is:
relax
(Other definitions for relax that I've seen before include "Take it easy, don't be so tense" , "Unwind, take it easy" , "Wind down" , "Moderate" , "Unbend" .)