Crossword Genius

Ready to fight (3)

Ross

There are a few possibilities for this:

Which length description are you looking for?:

3

2,2,4 2,7,5 3-2

(Other definitions for arm that I've seen before include "5 [BRANCH]" , "Limb or branch" , "Accoutre" , "Supply weapons" , "Sleeve" .)

I've seen this clue in The New York Times.
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