Related Clues:

• Low "Yo!"
• "Hey, over here!" hiss
• Whispered "hey"
• Hushed ''Hey, you!''
• Tip preceder, maybe
• "Ahem!" relative
• Cheater's utterance
• With 78 Across, brusque greeting
• Words upon arrival
• Hushed "Hey, you!"
• 'Whaddaya know!'
• ''Hey there!''
• Sibilant "Hey, you!"
• Furtive utterance
• Sound made with a cupped hand