Hero in the Trojan War (4)
I believe the answer is:
ajax
'hero in the trojan war' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ajax that I've seen before include "Greek warrior (Iliad)" , "old privy" , "Cleaner" , "Son of Telamon, hero of Trojan War" , "Legendary hero" .)