Metal band's employee listening, I think (7)

I believe the answer is:

rhodium

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'metal' is the definition.
(rhodium is a kind of metal)

I can't explain the rest of the clue.

(Other definitions for rhodium that I've seen before include "Hard metal" , "Chemical element, symbol Rh" , "Metallic element, atomic no 45" , "Hard metallic element" .)

I've seen this clue in The Guardian.

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