Crossword Genius

Head branches (7)

Ross

I believe the answer is:

antlers

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'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.

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(Other definitions for antlers that I've seen before include "Stag's crowning glory" , "Head branches of 18" , "Deer horns" , "Branched horns" , "Reindeer outgrowth" .)

I've seen this clue in the Evening Standard.
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