Related Clues:
- Stink; buzz
- Keep one's mouth shut?
- Low continuous indistinct sound
- Continuos low background noise
- Soothing sound
- Make music on a kazoo, say
- Noise from a beehive
- Sound of activity in university Her Majesty is going round
- A sign of business that is open to question
- Quietly, say, raised drink twice
- Drink repeatedly over cardiac glitch
- What many air conditioners do
- Sound of bee is sweet, but not bug
- Drink twice raised complaint
- Odds raised — that brings complaint