Related Clues:

• "Hey!" in class
• Cry for attention?
• Sibilant attention getter
• Low-key 'Hey!'
• ''Hey, this way!''
• ''Hey, you . . .''
• 'Psst...I'm in the tree!'
• ''Hey, Buddy!''
• Discreet summons
• Attention-getting whisper
• Not down there?
• Sound for attention
• '--, you!'
• "Yo!" in the library
• ''What's the big idea?''