Lays down the lawn (4)
I believe the answer is:
sods
'lays down the lawn' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sods that I've seen before include "Turves" , "sort of law" , "Unpleasant people" , "Lumps of turf" , "Lumps of earth" .)