Greek hero in Amsterdam football team (4)
I believe the answer is:
ajax
This clue is a double definition.
'greek hero' is the first definition.
(I've seen this before)
'amsterdam football team' is the second definition.
(I've seen this before)
'in' is the link.
(Other definitions for ajax that I've seen before include "Cleaner" , "Amsterdam football team" , "classic war hero" , "Son of Telamon, hero of Trojan War" , "Legendary hero" .)