New actors regularly appearing in the cinema? (7)
I believe the answer is:
theatre
'cinema?' is the definition.
(cinema is a kind of theatre)
'new actors regularly appearing in the' is the wordplay.
'regularly appearing' means one should take alternating letters.
'in' means one lot of letters goes inside another.
'new'+'actors'='newactors'
The alternating letters of 'newactors' are 'eatr'.
'eatr' going within 'the' is 'THEATRE'.
(Other definitions for theatre that I've seen before include "Where dramas may be" , "Playhouse or sphere of action" , "war zone" , "Site of plays or surgery" , "Place for dramatic performances" .)