Nothing but sandwiches and white wine (5)
I believe the answer is:
soave
'white wine' is the definition.
(Soave is an example)
'nothing but sandwiches' is the wordplay.
'nothing' becomes 'o' (O resembles 0).
'but' becomes 'save' (I've seen this in other clues).
'sandwiches' indicates putting letters inside (goes on either side like a sandwich).
'o' inserted inside 'save' is 'SOAVE'.
'and' acts as a link.
(Other definitions for soave that I've seen before include "Drink" , "White wine from NE Italy" , "Italian dry white wine" , "Italian wine region" , "Dry white wine from Verona" .)