Rubbish collecting for instance in pan (5)
I believe the answer is:
roast
'pan' is the definition.
(I've seen this before)
'rubbish collecting for instance' is the wordplay.
'rubbish' becomes 'rot' (I've seen this before).
'collecting' indicates putting letters inside.
'for instance' becomes 'as'.
'rot' enclosing 'as' is 'ROAST'.
'in' acts as a link.
(Other definitions for roast that I've seen before include "Oven joint" , "Cook in oven or by exposure to heat" , "Traditional Sunday joint?" , "Trash" , "Traditional dinner" .)