Related Clues:

• Prevent from talking
• "Farewell!"
• Cutting-in noise
• It's often bid
• See you, in Soho
• Stifle
• "Cheerio!"
• 'Pardon me...'
• Throaty interjection
• 'What am I, invisible?'
• A fond farewell
• 'Arrivederci'
• Bit of comedy
• Stand-up delivery
• Curtail one's freedom of speech