Related Clues:

• Sibilant attention getter
• Low-key 'Hey!'
• ''Hey, this way!''
• "How are ya?"
• ''Hey, you . . .''
• Greeting accompanied by a nod
• ''Hey, Buddy!''
• Discreet summons
• Attention-getting whisper
• Sound for attention
• '--, you!'
• "Yo!" in the library
• ''Pssst!''
• Enjoy dinner
• ''What's the big idea?''