Fabric drawers with sides having split (5)

I believe the answer is:

rayon

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'fabric' is the definition.
(I know that rayon is a type of fabric)

I don't understand the remainder of the clue.

(Other definitions for rayon that I've seen before include "Material - or any (anag)" , "Viscose fabric" , "Artificial fibre" , "Viscose fibre" , "Artificial silk fabric" .)

I've seen this clue in The Independent.

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