Chorus (7)
I believe the answer is:
refrain
'chorus' is the definition.
(I know that chorus can be written as refrain)
This is all the clue.
(Other definitions for refrain that I've seen before include "Stop oneself (from doing something)" , "Chorus of a song" , "Desist, abstain" , "Stop activity" , "Recurring music to forbear from" .)