Afternoon performance (7)
I believe the answer is:
matinee
'afternoon performance' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for matinee that I've seen before include "in which players may appear?" , "early "performance"" , "Afternoon performance (of play etc)" , "Daytime performance of play etc" , "Play, perhaps" .)