Landscaping roll (3)
I believe the answer is:
sod
'landscaping roll' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sod that I've seen before include "Piece of peat or grass" , "A lump of turf (3)" , "Piece of turf; a Law named for him" , "Surface layer of ground with grass roots" , "Piece of ground with a mat of grass" .)