Confection of beaten egg white and sugar (8)
I believe the answer is:
meringue
'confection of beaten egg white and sugar' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for meringue that I've seen before include "Crisp baked mixture of beaten egg whites and sugar" , "Mixture of sugar and egg-white baked crisp" , "a really sweet item" , "What can be made from egg whites and sugar" , "Dessert of beaten egg-white and sugar, baked crisp" .)