Son excited after performer appears (5,2)
I believe the answer is:
turns up
'appears' is the definition.
(turning up is a kind of appearing)
'son excited after performer' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'excited' becomes 'up'.
'after' is a charade indicator (letters next to each other).
'performer' becomes 'turn' ('turn' can mean a performer as well as their act).
's'+'up'='sup'
'sup' after 'turn' is 'TURNS UP'.
(Other definitions for turns up that I've seen before include "Arrives" , "Happens" .)