Related Clues:

• Whispered ''Hey!''
• Secretive ''Hey, buddy!''
• ''Caught you!''
• Library attention getter
• Furtive attention-getter
• Palindromic cry
• Alternative to 'Hey!'
• Soft "Over here!"
• Cheater's sound during a test
• Hushed "Hey!"
• ''Hey!''
• It ain't quite "Hey!"
• "Caught ya!"
• ''Hey!'' in a library
• Covert sound