Head branches (7)
I believe the answer is:
antlers
'head branches' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.
This is the entire clue.
Can you help me to learn more?
(Other definitions for antlers that I've seen before include "Stag's crowning glory" , "Head branches of 18" , "Deer horns" , "Branched horns" , "Reindeer outgrowth" .)