Spasm (6)
'spasm' is the definition.
(I know that tic is a type of twitch)
This is all the clue.
(Other definitions for tic that I've seen before include "Localised habitual twitch, especially to the face" , "Fuel oil" , "jerk" , "Twitch in anticipation" , "Convulsive spasm" .)
'spasm' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for twinge that I've seen before include "A small stab of pain" , "A slight jab of pain (6)" , "Sudden sharp feeling" , "Small, sharp pain" , "Sharp pain (of conscience?)" .)
(Other definitions for twitch that I've seen before include "Pang; small noose" , "by implication, is to look for birds" , "Jerk suddenly" , "jump" , "Nervous action" .)
'spasm' is the definition.
(thesaurus)
This is the entire clue.