Wedding dessert (4)
I believe the answer is:
cake
'wedding dessert' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cake that I've seen before include "Set" , "Thicken" , "Confectionery" , "Marie Antoinette's solution to 8" , "Dundee, Madeira, Christmas or birthday?" .)