Son of Zeus and Hera (4)
I believe the answer is:
ares
'son of zeus and hera' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ares that I've seen before include "Land measures" , "Greek god of war" , "figure of worship" , "Olympian" , "Belligerent god" .)