Related Clues:

• 'What am I, invisible?'
• "Beg pardon ..."
• Interjection to express doubt
• Throaty cousin of ''psst!''
• Meaningful little cough
• 'Excuse me …'
• 'Psst' alternative
• Sound of impatience
• ''Pardon me''
• ''Might I add a word?''
• Polite interrupter
• 'Pardon'
• [I'm talking here . . .]
• 'Your slip is showing'
• Meaning of a meaningful cough