Persona non grata (6)
I believe the answer is:
pariah
'persona non grata' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pariah that I've seen before include "Person rejected by society, outcast" , "someone socially unacceptable" , "Outcast (state)" , "An untouchable" , "person shunned" .)