Lees, sediment (5)
I believe the answer is:
dregs
I believe this clue is a double definition.
'lees' is the first definition.
(I've seen this in another clue)
'sediment' is the second definition.
(I know that dregs is a type of sediment)
(Other definitions for dregs that I've seen before include "Sediment, grounds" , "Sediment, lees" , "Parts of least value" , "Leftover drink, sediment" , "What's left" .)