Related Clues:

• IOU, e.g.
• Middle C, e.g.
• Spanish sun
• Staff note?
• '___ to self . . .'
• Staff member
• Note before la
• Fa's neighbor
• Symbol on a staff
• Jot down
• Musical staff symbol
• Part of a melody
• Costa del __
• Fa-la filler
• Space heater?