Stop at the chorus (7)
I believe the answer is:
refrain
This clue is a double definition.
'stop' is the first definition.
(I've seen this before)
'the chorus' is the second definition.
(synonyms)
'at' is the link.
(Other definitions for refrain that I've seen before include "Abstain; chorus" , "Stop oneself (from doing something)" , "Main theme" , "Hold back" , "The repeated lines at the end of verses" .)