Legislator, statesman (7)
I believe the answer is:
senator
I believe this clue is a double definition.
'legislator' is the first definition.
(I know that senator is a type of legislator)
'statesman' is the second definition.
(type of politician)
(Other definitions for senator that I've seen before include "US politician" , "One of 100 on Capitol Hill" , "Member of Upper House engaged in treason" , "Legislator -- treason (anag)" , "One from uni's governing body" .)