Dome-shaped dessert (5)
I believe the answer is:
bombe
'dome-shaped dessert' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bombe that I've seen before include "like some rounded furniture" , "Ice-cream dessert" , "Dome-shaped dessert, often frozen" , "Sweet" , "Ice cream frozen in a round mould" .)