Head, leader (5)
I believe the answer is:
chief
I believe this clue is a double definition.
'head' is the first definition.
(synonyms)
'leader' is the second definition.
(I know that chief is a type of leader)
(Other definitions for chief that I've seen before include "arch" , "Head of a native American tribe" , "Ordinary type" , "Tribal head" , "Principal" .)