Smorgasbord in Polish and in French (6)
I believe the answer is:
buffet
'smorgasbord' is the definition.
(I've seen this in another clue)
'polish and in french' is the wordplay.
'polish' becomes 'buff' (buffing is a kind of polishing).
'and' says to put letters next to each other.
'in french' becomes 'et' (I've seen this in other clues).
'buff'+'et'='BUFFET'
'in' is the link.
(Other definitions for buffet that I've seen before include "Refreshment counter - slap" , "self-service place" , "A self-help dining experience" , "Kind of meal where guests serve themselves (6)" , "Blow - self-service food" .)