Related Clues:

• Buzz; stink
• Play with a plectrum
• Well-tuned engine output
• Sing with mouth closed
• Drone or buzz
• Vibration sound
• Operate smoothly
• Play badly on a guitar
• Play (a guitar)
• Strike a chord, perhaps
• Bees make it
• Strike a chord, in a way
• Good machine sound
• Play mindlessly
• Busy place's buzz