Related Clues:

• Play monotonously, that's almost the spirit
• Drum with the fingers
• Buzz from the endless drink
• Often upset, ignoring constant mechanical noise
• Most of the drink produces dull drone
• The end of a weaver's thread
• The endless drink produces monotonous drone
• Smell badly (slang)
• Tiresome beat starts to test hotel resident's unruffled manner
• How to play the kazoo
• No end to the strange drone
• White noise, perhaps
• Sound of 'The Chain' in umpteenth 'Rumours'?
• Pluck idly, as a guitar
• Sing with closed mouth