Turkish leader (3)
I believe the answer is:
aga
'turkish leader' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aga that I've seen before include "Kitchen range" , "Large iron stove" , "Cooking range" , "Proprietary name for a domestic stove" , "--- Khan, spiritual head of Ismaili Muslims" .)