Glazed currant bun (7)
I believe the answer is:
teacake
'glazed currant bun' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for teacake that I've seen before include "Scones with raisins, toasted and buttered" , "Bun served toasted" , "food item" , "Bun for toasting" , "Fruited bun" .)