Like to stuff rubbish cook in the oven (5)
I believe the answer is:
roast
'cook in the oven' is the definition.
(I've seen this before)
'like to stuff rubbish' is the wordplay.
'like' becomes 'as'.
'to stuff' means one lot of letters goes inside another.
'rubbish' becomes 'rot' (I've seen this before).
'as' going within 'rot' is 'ROAST'.
(Other definitions for roast that I've seen before include "Criticise severely" , "Traditional Sunday joint?" , "dish of lamb, say" , "Cook (meat) over a fire" , "Oven-cook, tease" .)