Muscular contraction (5)
'muscular contraction' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spasm that I've seen before include "Convulsive action" , "Convulsion or paroxysm" , "Involuntary muscular contraction" , "Jerk" , "cramp" .)
'muscular contraction' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tic that I've seen before include "Regular muscular twitch" , "Facial twitch" , "Jerky movement" , "jerk" , "Involuntary muscle movement" .)