Crossword Genius

Radius setting (3)

Ross

I believe the answer is:

arm

'radius setting' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for arm that I've seen before include "Test of strength with elbows on the table" , "Body part" , "Provide with weapons" , "Prime" , "Activate fuse" .)

I've seen this clue in The Wall Street Journal and the King Feature Syndicate.
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