Crossword Genius

Limbs used in battle (4)

Ross

I believe the answer is:

arms

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'limbs' is the definition.
(I know this)

I can't explain the remainder of the clue.

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(Other definitions for arms that I've seen before include "International competition for weapons" , "Crest - guns" , "pacifists won't take up" , "Weapons, collectively" , "Supplies weapons" .)

I've seen this clue in The Irish News.
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