Greek god's angry being overthrown (4)
I believe the answer is:
eros
'greek god's' is the definition.
(Eros is an example)
'angry being overthrown' is the wordplay.
'angry' becomes 'sore' ('sore' can be similar in meaning to 'angry').
'being overthrown' says the letters should be written backwards.
'sore' written backwards gives 'EROS'.
(Other definitions for eros that I've seen before include "Greek god of love - see statue in Piccadilly" , "Deity" , "Goddess" , "Arrow-shooting god" , "Winged archer" .)