Related Clues:

• Monotonous speaker
• Johnny in a 1937 song
• Annoying hum
• Fail to modulate
• Borrrring voice
• What Kenny G held for 45 minutes and 47 seconds
• Queen's attendant
• Monotonous tone
• Bee in a hive
• Lacking range
• Remote-controlled craft
• Sing sans melody
• Plane sans pilot
• Go on (and on, and on ...)
• Queen's mate