Asylum seeker from rotten regime (6)
I believe the answer is:
emigre
'asylum seeker' is the definition.
(I've seen this in another clue)
'rotten regime' is the wordplay.
'rotten' is an anagram indicator.
'regime' is an anagram of 'EMIGRE'.
'from' is the link.
(Other definitions for emigre that I've seen before include "Person leaving to settle in another country" , "One who has left his country for political reasons" , "Political refugee, especially a royalist fleeing the French Revolution" , "One gone abroad for political reasons" , "Person moving abroad" .)