Related Clues:

• Twinge of pain
• One might be verbal
• Sharp pain
• Sudden pang
• Involuntary contraction
• First O of O-O-O
• First correct Hollywood Square
• Pang of conscience
• First X?
• Attack of remorse
• First X or O?
• Convulsion
• Part of three-in-a-row
• Hunger indicator
• Nervous habit