Pariah not at home to actors (7)
I believe the answer is:
outcast
'pariah' is the definition.
(I know that pariah can be written as outcast)
'not at home to actors' is the wordplay.
'not at home' becomes 'out' (out can mean away from home).
'to actors' becomes 'cast' (group of actors).
'out'+'cast'='OUTCAST'
(Other definitions for outcast that I've seen before include "Role of Ishmael" , "Discarded" , "One rejected by group" , "untouchable" , "One banished from society" .)