Related Clues:

• Orchestra pitch-setter
• It means "high wood"
• Two-reed instrument
• Instrument the band tunes up to
• Philharmonic instrument
• Many-stringed instrument
• 37-Across' instrument
• An orchestra tunes to one
• Orchestral reed
• Chopin's instrument
• Soprano-range woodwind
• See 17 Across
• Steinway, say
• Peter and the Wolf's 'duck'
• 'O' in a phonetic alphabet