Stage comeback? (6)
I believe the answer is:
encore
'stage comeback?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for encore that I've seen before include "Extra item at end of concert" , "Call to perform again" , "Sing it again, please" , "Repetition of performance" , "Let's hear/see it again!" .)