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Note what e.g. Gloucester manufacturer uses up (6)

Ross

I believe the answer is:

tenner

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'note' is the definition.
(a tenner is a 10 pound note)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for tenner that I've seen before include "Ten pound note (colloq.)" , "sounded by Peter Pears" , "Note - sounds like singer" , "UK banknote" , "A spot of money" .)

I've seen this clue in The Guardian.
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