Fruit for ruler's wife (7)
I believe the answer is:
sultana
'fruit' is the definition.
(sultana is a kind of fruit)
'ruler's wife' is the wordplay.
I cannot quite understand how this works, but
'ruler' could be 'sultan' (sultan is a kind of ruler) and 'sultan' is found in the answer.
A single letter 'a' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for sultana that I've seen before include "sweet little thing" , "Sovereign's mother perhaps" , "Grape; ruler's wife" , "Muslim ruler's wife perhaps" , "Shrivelled up" .)