Item of furniture, mostly pastel article (4)

I believe the answer is:

sofa

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'item of furniture' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

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(Other definitions for sofa that I've seen before include "Wide padded seat" , "Lounge" , "Item of furniture" , "Upholstered seating" , "Upholstered seat for more than one person" .)

I've seen this clue in The Independent.

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