Possible Clues:

• Ducks, in 'Peter and the Wolf' productions
• Heckelphone relatives
• Instruments of blowers? Oddly enough, that's right
• Music makers, 'Drifters', lacking a lead
• They can be played with old bones, but not new
• 'E boos at the blowers
• High-pitched double-reeds
• Wind quintet instruments
• They require double reeds
• Duo in a typical symphony