Scrabble piece (4)
I believe the answer is:
tile
'scrabble piece' 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 "Thin rectangular slab to cover surfaces" , "Roofing material" , "Flat piece of ceramic" , "Flat, thin slab to cover surface" , "Thin slab used to cover roof, wall, floor etc" .)