Polish up a Cherubini piece (3)

I believe the answer is:

rub

'polish' is the definition.
(polish meaning rub to make shiny)

'up a cherubini piece' is the wordplay.
'piece' indicates a hidden word.
'RUB' can be found hidden inside 'up cherubini'.

(Other definitions for rub that I've seen before include "Abrade" , "Central difficulty" , "Ointment; copy (a brass)" , "Massage or burnish" , "trouble" .)

I've seen this clue in the Evening Standard.

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