Related Clues:

• Start of a conversation in class, maybe
• "Hey! Listen up!"
• "Hey, look at me!"
• Quiet attention-getter
• (Come closer)
• Soft "Hey, you"
• "Hello there!"
• Start of a quiet sentence
• Start of a secret exchange, perhaps
• Hushed "Hey, over here!"
• Discreet conversation starter
• Whispered "Yo!"
• "Hey, can you keep a secret?"
• Clandestine summons