Stop repeating musical passage (7)
I believe the answer is:
refrain
This clue is a double definition.
'stop' is the first definition.
(thesaurus)
'repeating musical passage' is the second definition.
(Other definitions for refrain that I've seen before include "Abstain; chorus" , "tune" , "The repeated lines at the end of verses" , "Desist, abstain" , "Main theme" .)