Leaders in artistic innovations

• Ahead of its time
• Like innovative art
• In the arts, radically new and daring
• Like John Cage's music
• Unorthodox, untraditional leaders
• Like the work spelled out by the shaded letters
• Like experimental art
• Daringly unconventional
• Those at the head of a literary movement: Fr

Wiktionary Word definitions in Wiktionary
n. (alternative form of avant-garde English)