An article in white marble (4)

I believe the answer is:

item

'an article' is the definition.
(thesaurus)

'in white marble' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ITEM' is hidden in the letters of 'white marble'.

(Other definitions for item that I've seen before include "Two lovers as one" , "Two people romantically linked" , "Piece of news: unit" , "couple linked" , "Individual unit in a list" .)

I've seen this clue in the Evening Standard.

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