Golf course supply
I believe the answer is:
sod
'golf course supply' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sod that I've seen before include "Surface layer of ground with grass roots" , "'Sward, turf (3)'" , "Piece of turf; a Law named for him" , "Lump of turf or unpleasant person" , "A lulmp of turf" .)