Dressing some cheek (5)
I believe the answer is:
sauce
I believe this clue is a double definition.
'dressing' is the first definition.
(I've seen this in another clue)
'some cheek' is the second definition.
(I've seen this in another clue)
(Other definitions for sauce that I've seen before include "It's good for the goose and gander" , "Worcester, say" , "Cause (anag.)" , "Dressing served with food" , "Lip; foodstuff" .)