Possible Clues:

• Midsize Hyundai
• Boy present for a musical performance
• Beethoven's "Waldstein," e.g
• Beethoven's 'Moonlight,' for one
• Issue a word of thanks for some music
• Solo composition
• 'Moonlight,' e.g.
• Solo piano composition
• Beethoven's "Moonlight," e.g
• Piece of music for solo piano