Related Clues:

• Confidential warning
• 'Don't tell anyone, but...'
• Hushed ''Hey!''
• Attention-getting word
• Classroom nudge
• Sibilant call
• Subtle signal
• Verbal elbow?
• Subtle "Over here!"
• The Say ___ Kid (Willie Mays)
• "Listen up!"
• Start of a library volume discussion?
• ''Just a cotton-pickin' minute!''
• "Yo, over here!"
• Sarge's command