Related Clues:

• Cry for attention?
• Sibilant attention getter
• Low-key 'Hey!'
• ''Hey, this way!''
• ''___! The Herald Angles Sing''
• ''Hey, you . . .''
• Fully attentive
• ''Hey, Buddy!''
• Discreet summons
• Attention-getting whisper
• ''___! The Herald Angels Sing''
• Sound for attention
• "Yo!" in the library
• Tap-on-the-shoulder alternative
• It ain't exactly "Hey!"