Ruler leaving dried fruit unfinished (6)
I believe the answer is:
sultan
'ruler' is the definition.
(I know that Sultan is a type of ruler)
'dried fruit unfinished' is the wordplay.
'dried fruit' becomes 'sultana' (sultana is a kind of dried fruit).
'unfinished' means to remove the last letter.
'sultana' with its final letter taken away is 'SULTAN'.
'leaving' acts as a link.
(Other definitions for sultan that I've seen before include "Sovereign of a Muslim state" , "Turkish ruler" , "Ruler of Brunei" , "Ottoman emperor" , "Muslim ruler" .)