Furniture item as yet unfinished (4)
I believe the answer is:
sofa
'furniture item' is the definition.
(sofa is a type of furniture)
'yet unfinished' is the wordplay.
'yet' becomes 'sofar' (up until the present moment).
'unfinished' means to remove the last letter.
'sofar' with its last letter taken away is 'SOFA'.
'as' is the link.
(Other definitions for sofa that I've seen before include "Area for sitting" , "Long upholstered seat with back and arms" , "Wide padded seat" , "Upholstered seating" , "Oafs (anag.)" .)