Related Clues:

• Manuscript with dense notes?
• Recital piece, often
• Practice piece at a conservatory
• Musical piece, duet, spoiled by echo
• Conservatory exercise
• Chopin's "Winter Wind," for one
• Piece played in a conservatory
• Keyboard challenge
• Practice piece for a pianist
• Piano challenge
• Exercise done while sitting
• Keyboard offering
• Scriabin work
• Chopin's 'Black Keys,' e.g
• Virtuosic piece