Wife of Zeus (4)
I believe the answer is:
hera
'wife of zeus' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hera that I've seen before include "Greek queen of Olympian gods" , "Jealous sister and wife of Zeus" , "Divinity" , "marriage goddess" , "Consort of Zeus" .)