A picture frame (5)

I believe the answer is:

easel

'a picture frame' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for easel that I've seen before include "artistic aid" , "Constable's stand?" , "supporter of the arts" , "Artist's canvas holder" , "Picture frame" .)

I've seen this clue in the Evening Standard.

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