Related Clues:

• Observant
• Ear-grabbing sound
• ''Want to hear a secret?''
• Cry for attention
• Red state?
• Like a worthy watchdog
• Hushed "Hey you!"
• 'Hey, over here ...'
• Having heightened senses
• Hushed ''Hey you!''
• ''Listen!'', old-style
• APB, for one
• Sibilant "Hey!"
• Listen
• Soft "Hey!"