Related Clues:

• Sibilant call
• ''Anybody home?''
• Subtle signal
• Verbal elbow?
• Subtle "Over here!"
• Start of a library volume discussion?
• "Yo, over here!"
• Hissed nudge
• Furtive "Yo!"
• ''Over here''
• Alternative to 'Yo!'
• Furtive ''Hey!''
• Soft attention getter
• Classroom attention getter
• Wordless summons