Sharp-tasting dessert (4)

I believe the answer is:

tart

I believe this clue is a double definition.

'sharp-tasting' is the first definition.
(tart can mean bitter-tasting)

'dessert' is the second definition.
(type of dessert)

(Other definitions for tart that I've seen before include "Sharp; pastry" , "Sharp or acid tasting" , "Bitter - pudding" , "Tasting sour like a lemon" , "Flat pie" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app