Deer horns (7)
I believe the answer is:
antlers
'deer horns' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for antlers that I've seen before include "Bony outgrowths on head of male deer" , "Stag's crowning glory" , "Head branches of 18" , "Branched horns" , "Deer horns" .)