Deny it's junk (6)
I believe the answer is:
refuse
I believe this is a double definition.
'deny' is the first definition.
('refuse' can be a synonym of 'deny')
'junk' is the second definition.
(thesaurus)
'it's' acts as a link.
(Other definitions for refuse that I've seen before include "Say no to - rubbish" , "Decline, repudiate" , "Turn down; waste" , "litter" , "Turn away" .)