Possible Clues:

• 'Sonatine Bureaucratique' composer
• 'Gymnopédies' composer Erik
• Composer of "furniture music"
• Erik —, French composer
• Lampoon's not right for a composer
• Composer made it a symphony, not entirely uplifting
• Composer Erik of the nearly unplayable 'Vexations'
• French composer of 'Vexations'
• Composer of gnossiennes
• South African connection for French composer