Dessert wine (7)
I believe the answer is:
madeira
'dessert wine' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for madeira that I've seen before include "Sponge-cake" , "A fortified wine, a rich sponge" , "cake producer" , "Cake - wine" , "Fortified white wine from island off NW Africa" .)