Expel actors, pouty, ignoring outsiders (4,3)
I believe the answer is:
cast out
'expel' is the definition.
(I know that cast out is a type of expel)
'actors pouty ignoring outsiders' is the wordplay.
'actors' becomes 'cast' (group of actors).
'ignoring outsiders' means to look at the middle letters.
The middle of 'pouty' is 'out'.
'cast'+'out'='CAST OUT'
(Other definitions for cast out that I've seen before include "Expelled" , "Expel" , "Rejected from a group" .)