Ham it up onstage (5)
I believe the answer is:
emote
'ham it up onstage' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for emote that I've seen before include "Exaggerate one's feelings" , "Show heightened feelings" , "'effuse'" , "Display strong feeling in a theatrical manner" , "Show feeling excessively" .)