Possible Clues:

• Arrangement of Israeli composer
• Rival composer of Mozart
• Composer who tutored Mozart's son
• Small fib about a rare, independent music maker?
• Rival of Mozart
• 'Amadeus' villain
• Real-life opera composer who's a title character in a Rimsky-Korsakov opera
• Pushkin’s play Mozart and ____ was the first work of fiction to depict a rivalry with little factual foundation
• Italian composer put rest in jaunty airs
• Teacher of Beethoven and Schubert