Related Clues:

• Flying toy
• Sound from a Burmese
• Buzzing sound
• Dull speaker
• Reek
• Worrisome engine sound
• Speak in a monotone
• Cat or engine sound
• Run smoothly, as an engine
• Hum, e.g.
• Vibratory sound
• Run well
• Ricochet sound
• Certain queen's subject
• Hive dweller