Ruins god (4)
I believe the answer is:
mars
This clue is a double definition.
'ruins' is the first definition.
(to mar is to ruin or spoil)
'god' is the second definition.
(Mars is an example)
(Other definitions for mars that I've seen before include "Spoils - heavenly body" , "Fourth planet from the Sun" , "classical god" , "part of suite" , "blights" .)