The term 'motorcade leader' is a job description for someone who escorts a motorcade, which is a procession of vehicles. The crossword solution for this term is 'ESCORT, ' which is a six-letter word. An ESCORT is someone who accompanies and protects a person or group of people, usually in a ceremonial or formal setting. In the case of a motorcade leader, they are responsible for leading the procession of vehicles and ensuring the safety of the people in the motorcade.