Piece of furniture, up to now unfinished (4)
I believe the answer is:
sofa
'piece of furniture' is the definition.
(sofa is a type of furniture)
'up to now unfinished' is the wordplay.
'up to now' becomes 'sofar' (I've seen this in another clue).
'unfinished' means to remove the last letter.
'sofar' with its last letter removed is 'SOFA'.
(Other definitions for sofa that I've seen before include "Divan" , "Comfy piece of furniture" , "Oafs (anag.)" , "Wide padded seat" , "Item of furniture" .)