Norse Zeus (4)
I believe the answer is:
odin
'norse zeus' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for odin that I've seen before include "Supreme god of war in Norse mythology" , "I nod to the Norse deity" , "Mythological Norse god of war" , "Old Scandinavian" , "In Scandinavian myth the supreme god and creator" .)