Sort of movement some solicitor set up (3)
I believe the answer is:
tic
'sort of movement' is the definition.
'some solicitor set up' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'set up' is a reversal indicator.
'cit' is hidden in the letters of 'solicitor'.
'cit' reversed gives 'TIC'.
(Other definitions for tic that I've seen before include "Spasmodic muscular twitch" , "Involuntary muscle movement" , "Facial movement" , "Nervous spasm" , "Facial muscle spasm" .)