Buck features (7)
I believe the answer is:
antlers
'buck features' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for antlers that I've seen before include "Branched horns" , "Bony outgrowths on head of male deer" , "Reindeer outgrowth" , "Deer horns" , "Stag's crowning glory" .)