Retribution, destiny (7)
I believe the answer is:
nemesis
I believe this clue is a double definition.
'retribution' is the first definition.
(spirit of retribution in Greek mythology)
'destiny' is the second definition.
(I've seen this before)
(Other definitions for nemesis that I've seen before include "Destiny" , "Retribution personified" , "opponent you can't beat" , "Nee Miss (anag.)" , "Something causing misery (or death) - Meissen (anag)" .)