Related Clues:

• Key of 'F?r Elise'
• Sheet music sign
• Key in that piano song played with your knuckles
• D neighbor
• D sharp's equivalent
• Bass symbol
• Chopin's 'Polonaise in ___ Major, Op. 53'
• Key of the overture to Mozart's "The Magic Flute"
• Note near F
• Register indicator
• Music-score header
• Pitch setter
• ___ major (key of Beethoven’s “Eroica”)
• Tenor ___
• See 18 Across