Non-magnetic metal used in making steel, Mn (9)

I believe the answer is:

manganese

(Other definitions for manganese that I've seen before include "Hard grey metal, Mn" , "Metallic element used in steels" , "Element - Anne's game (anag)" , "Metallic element, Mn" , "Element, symbol Mn" .)

I've seen this clue in The Guardian.

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