Posed wearing shiny material (5)

I believe the answer is:

satin

'shiny material' is the definition.

'posed wearing' is the wordplay.
'posed' becomes 'sat' ('sit' can be a synonym of 'pose').
'wearing' becomes 'in' (wear in (and 'in' is fashionable)).
'sat'+'in'='SATIN'

(Other definitions for satin that I've seen before include "Saint (anag.)" , "Lustrous fabric" , "Smooth and silky" , "Silk fabric" , "Stain on silky cloth" .)

I've seen this clue in The Telegraph.

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