Purported leader of Oceania in a 1949 dystopian novel (3,7)
I believe the answer is:
big brother
(Other definitions for big brother that I've seen before include "Orwell's head of state in "Nineteen Eighty-four"" , "He was watching you (Orwell)" , "oppressor, for Winston" , "dictatorial controller" , "Orwellian dictator - TV show" .)