Quit chorus (7)
I believe the answer is:
refrain
I believe this is a double definition.
'quit' is the first definition.
(thesaurus)
'chorus' is the second definition.
(I know that chorus can be written as refrain)
(Other definitions for refrain that I've seen before include "burden" , "Lines repeated at the end of each verse" , "Repeating line in a song, poem" , "tune" , "Words repeated after verses" .)