Go before or quietly go back? (7)
I believe the answer is:
precede
'go before' is the definition.
(I've seen this before)
'quietly go back?' is the wordplay.
'quietly' becomes 'p' (musical symbol).
'go back?' becomes 'recede' (going back is a kind of receding).
'p'+'recede'='PRECEDE'
'or' is the link.
(Other definitions for precede that I've seen before include "Go before in time or order" , "Having to come in front" , "Go before (someone)" , "Pave the way" , "go before the others" .)