Waste, rubbish (6)
I believe the answer is:
refuse
I believe this is a double definition.
'waste' is the first definition.
(refuse is a kind of waste)
'rubbish' is the second definition.
(refuse can mean rubbish or garbage)
(Other definitions for refuse that I've seen before include "Say no to - rubbish" , "Trash" , "Decline to accept - waste" , "Say no to - waste" , "Turn down; waste" .)