Roofing piece (4)
I believe the answer is:
'roofing piece' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tile that I've seen before include "Scrabble piece" , "Roofing material" , "Flat piece of ceramic" , "Small slab of baked clay for covering walls, roofs etc" , "Oblong piece of glazed clay for bathroom wall" .)