Reject blooming actors (7)
I believe the answer is:
outcast
'reject' is the definition.
(thesaurus)
'blooming actors' is the wordplay.
'blooming' becomes 'out' (I've seen this in other clues).
'actors' becomes 'cast' (I've seen this before).
'out'+'cast'='OUTCAST'
(Other definitions for outcast that I've seen before include "A reject like 10 Across" , "One has been rejected by friends or society" , "untouchable" , "Displaced person" , "one's not admitted" .)