Related Clues:

• Do ''Boo!'' to
• It's not fair
• Say ''boo'' to
• Hair-raiser
• Near-miss
• Induce to jump
• 10/31 sensation
• A touch of panic
• "Phew!"
• Give a fright
• Deter, with ''off''
• Strikeout averter, perhaps
• One might be caught for an out
• Instill fear in
• Curl the hair of