Dried seedless grape (7)
'dried seedless grape' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for currant that I've seen before include "Small black raisin" , "Small dried seedless grape" , "Product of grape" , "Extirpate" , "Edible berry, red or black" .)
(Other definitions for sultana that I've seen before include "concubine?" , "Sovereign's mistress" , "Grape; ruler's wife" , "Dried pale yellow seedless grape" , "pudding ingredient" .)