Turn down garbage (6)
I believe the answer is:
refuse
I believe this is a double definition.
'turn down' is the first definition.
(I know that turn down can be written as refuse)
'garbage' is the second definition.
(I know that garbage can be written as refuse)
(Other definitions for refuse that I've seen before include "Decline, repudiate" , "Pass up" , "Reject the waste material" , "Don't take the rubbish" , "household rubbish" .)