Crossword Genius

Money for a side of beef? (6)

Ross

I believe the answer is:

silver

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'money' is the definition.
(thesaurus)

I can't explain the rest of the clue.

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(Other definitions for silver that I've seen before include "Sliver of precious metal" , "Soft, white, precious metal" , "old folk?" , "Second-rank medal" , "Pretty tree with peeling bark" .)

I've seen this clue in the Evening Standard.
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