Piece of office furniture (4)
I believe the answer is:
desk
'piece of office furniture' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for desk that I've seen before include "Piece of furniture for writer" , "Escritoire - service counter" , "Writer's workbench" , "Bureau" , "Place for writing or serving the public" .)