Crossword Genius

Steel limb (3)

Ross

I believe the answer is:

arm

I believe this clue is a double definition.

'steel' is the first definition.
(I've seen this before)

'limb' is the second definition.
(I know that limb can be written as arm)

(Other definitions for arm that I've seen before include "Test of strength with elbows on the table" , "Maybe rifle" , "Supply weapons" , "Limb; weapon" , "5 [BRANCH]" .)

I've seen this clue in The Sun.
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