Banter with husband in greasy spoon (5)
I believe the answer is:
chaff
'banter' is the definition.
(I know that banter can be written as chaff)
'husband in greasy spoon' is the wordplay.
'husband' becomes 'h' (abbreviation).
'in' is an insertion indicator.
'greasy spoon' becomes 'caff' (I've seen this in other clues).
'h' placed inside 'caff' is 'CHAFF'.
'with' acts as a link.
(Other definitions for chaff that I've seen before include "Refuse - banter" , "Light-hearted banter" , "Laugh at" , "Corn-husks separated from the grain" , "Worthless material (from corn)" .)