Related Clues:

• Pager signal
• Go smoothly
• Part of the city cacophony
• Road Runner's taunt halved
• Honk
• Traffic sound
• Sound from a fan
• Motor sound
• Use kazoos
• When repeated, the Road Runner's cry
• Drone
• Be at a loss for words?
• Render a tune
• Gridlock sound
• Expurgate