Support skinning mustelids (5)
I believe the answer is:
easel
'support' is the definition.
(easel is a kind of support)
'skinning mustelids' is the wordplay.
'skinning' means to look at the middle letters (the word is skinned of its outside letters).
'mustelids' becomes 'weasels' (weasel is a kind of mustelid).
The central letters of 'weasels' are 'EASEL'.
(Other definitions for easel that I've seen before include "Artist's canvas holder" , "Support for artist's canvas" , "Van Gogh's stand?" , "Blackboard-frame" , "Display tripod" .)