Golf feat (5)
I believe the answer is:
eagle
'golf feat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eagle that I've seen before include "A glee-ful bird?" , "Bird of prey, may be golden" , "one's well below par" , "Keen-sighted bird of prey" , "Two under in 20 across" .)