Wine sediment (4)
I believe the answer is:
lees
'wine sediment' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lees that I've seen before include "Dregs of drink" , "Wine at bottom of glass" , "Dregs, sediment" , "Sediment from fermentation of alcohol" , "Sediment that settles at the bottom of liquid" .)