 After some years traveling in the late 1940s, McLean resigned his commission and returned to Albania one last time, joining a clandestine organization operated by the United States and British intelligence agencies to undermine Enver Hoxha and the Communist government there.In 1949 he married Daška Ivanović, from Dubrovnik in Croatia.Coincidentally his new brother-in-law, diplomat Vane Ivanovic, had been a member of the Yugoslav section of the Political Warfare Executive (PWE), the propaganda arm of SOE, during the war.