Related Clues:

• Informal conversation opener
• Teacher's request
• Take heed
• 'You're not paying attention!'
• 'Pay attention!'
• First word of 'Paul Revere's Ride'
• 'Hey …!'
• ''I'm talking to you!''
• "Pay attention!"
• Pay close attention
• Listen
• Not tune out
• 'Now see here …'
• Tune in
• 'Let me tell you ...'