Possible Clues:

• Revolutionary set up party in a month
• Revolutionary awfully vague, meeting Royal Academician
• Face seen on many T-shirts
• "Guerrilla Warfare" author
• Latin politico turned a party ugly, alienating half
• Compadre of Castro
• Che —, revolutionary
• Portrait subject of a Diego Maradona arm tattoo
• Ernesto __, revolutionary better known as 'Che'
• Che, initially going underground, espousing violence as rebel activist