The crossword solution for the term 'Fidel's Amigo' is CHE, which stands for Ernesto 'Che' Guevara, a Marxist revolutionary and Cuban leader who was a close friend and ally of Fidel Castro. Guevara was a key figure in the Cuban Revolution and served as Minister of Industry and President of the National Bank of Cuba. He also wrote extensively on guerrilla warfare and was a major influence on Latin American politics.