Bit of flooring (4)
I believe the answer is:
tile
'bit of flooring' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tile that I've seen before include "Hat" , "Roof slabs" , "Roofing material" , "Small slab of baked clay for covering walls, roofs etc" , "Oblong piece of glazed clay for bathroom wall" .)