Crossword Genius

Iron alloy (5)

Ross

I believe the answer is:

steel

'iron alloy' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for steel that I've seen before include "Hard, strong, grey alloy" , "brace" , "Knife-sharpener" , "Make hard and unfeeling" , "Mixture of carbon and iron" .)

I've seen this clue in The Mirror and the Evening Standard.
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