Related Clues:

• Covert attention-getter
• Low-key "Hey!"
• Sibilant "Ahem!"
• "Over here!" sound
• Attention-getting noise
• It's attention-getting
• It may precede "Over here!"
• Sound before "Yeah, you!"
• Whispered exclamation
• [Over here!]
• ("Hey you ...")
• 'Hey, over here!' hiss
• Low "Yo!"
• "Hey, over here!" hiss
• Whispered "hey"