Related Clues:

• Beckoning cry
• 'Psst' follower
• "Psst" follower
• Text from a waiting car pool driver
• Arrival cry
• Hider's hissed revelation
• Arrival declaration
• Shout when you walk in late
• Egotist's 'The party can start now!'
• Arriver's declaration
• Vague reply to "Where are you?"
• "We can share this hiding place!"
• "Knock, knock!"