Related Clues:

• Hum endlessly
• Stay on one note
• Male honeybee
• Stingless honeybee
• Sustained hum
• Overcaffeinated feeling
• Sort of signal
• Bor-r-ring voice
• Male in the hive
• Worker bee
• Rumor
• Monotonous speaker
• Annoying hum
• Fail to modulate
• Borrrring voice