Apple dessert (3)
I believe the answer is:
pie
'apple dessert' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pie that I've seen before include "Dish baked in pastry-lined pan" , "Pastry-topped dish" , "Anna's constituent" , "where blackbirds sang" , "Irrational things to do with circles and logs" .)