Related Clues:

• ''Hey, Mac!''
• Call for attention
• ''Pardon me!''
• Haunted house sound
• Head-turner
• Coughlike utterance
• Sibilant exclamation
• 'Stop right there!'
• Calif. and Wash. are on it
• Call to share a secret?
• Verbal nudge
• Certain wail
• Attention-getter, in the audience
• Bellow
• ''Hey, you!''