Related Clues:

• Theme, Part 2
• Unpleasant smell
• Rhythmic sound
• Play a kazoo
• Overcaffeinated feeling
• Sort of signal
• Make music on a comb
• Rumor
• Hive sound
• Sing without words
• Sing with closed lips
• Symptom for a car mechanic
• Refrigerator sound
• Sound happy, maybe
• Fake the vocals in Rock Band, say