Overthrow welcoming execution over exile (7)
I believe the answer is:
outcast
'exile' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for outcast that I've seen before include "Discarded" , "One has been rejected by friends or society" , "One is excluded from society" , "In one of the islands, Joseph wrote" , "'Person excluded from society, a pariah (7)'" .)