Muscular spasm (5)
'muscular spasm' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tic that I've seen before include "Muscular contraction" , "Facial twitch" , "Twitch in analytical way" , "Nervous twitch" , "Involuntary muscular spasm" .)
'muscular spasm' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for cramp that I've seen before include "Sudden painful tightening of a muscle" , "Confine - muscular spasm" , "hamper" , "Contract" , "Form of muscular pain" .)