God is angry on being overthrown (4)
I believe the answer is:
eros
'god' is the definition.
(Eros is an example)
'angry on being overthrown' is the wordplay.
'angry' becomes 'sore' ('sore' can be similar in meaning to 'angry').
'on being overthrown' is a reversal indicator.
'sore' backwards is 'EROS'.
'is' is the link.
(Other definitions for eros that I've seen before include "Winged archer" , "Rose for the love-god" , "divinity" , "Pagan god" , "God of love; life instinct (Freud)" .)