One metal fused into many (8)

I believe the answer is:

antimony

I'm a little stuck... Click here to teach me more about this clue!

'one metal' is the definition.
(I know that antimony is a type of metal)

'fused into many' is the wordplay.
'into many' can be anagrammed to 'ANTIMONY'.
However, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for antimony that I've seen before include "Bluish-white element, symbol Sb" , "Brittle element" , "Semimetallic element" , "One element" , "Toxic metallic element used in semiconductors" .)

I've seen this clue in The Globe and Mail.

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