Seedless raisin (7)
I believe the answer is:
'seedless raisin' is the definition.
(I know that seedless raisin can be written as sultana)
This is the entire clue.
(Other definitions for sultana that I've seen before include "Royal lady" , "Shrivelled up" , "fruity little thing" , "bit of a fruit cake" , "Dried fruit - woman in harem" .)