Related Clues:

• Sibilant signal
• Sleuth's cry
• Subtle alert
• Relative of ''ahem''
• "Gotcha!"
• 'Lookee here!'
• 'So that's what you're up to!'
• Soft "Yo! Over here!"
• Cry of amused surprise
• ''That's your game, eh?''
• Discoverer's word
• "How about that!"
• Furtive ''Yo!''
• Note passer's signal
• ''What have we here?''