League's ruined without uniform golf scores (6)
I believe the answer is:
eagles
'golf scores' is the definition.
I don't understand how the remainder of the clue works.
(Other definitions for eagles that I've seen before include "Soaring birds of prey (6)" , "Large birds of prey" , "They nest in eyries" , "Golf scores of two under par" , "Noble birds that live in eyries" .)