Rubbish issue (6)
I believe the answer is:
litter
I believe this clue is a double definition.
'rubbish' is the first definition.
(litter is a kind of rubbish)
'issue' is the second definition.
(thesaurus)
(Other definitions for litter that I've seen before include "Form of transport" , "Discarded paper etc." , "Offspring - rubbish" , "carrier" , "Scattered rubbish" .)