Never accept rubbish (6)
I believe the answer is:
refuse
'rubbish' is the definition.
(refuse can mean rubbish or garbage)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for refuse that I've seen before include "Turn down - rubbish" , "Junk" , "Turn away" , "Decline to accept garbage" , "Decline to take the rubbish" .)