Related Clues:

• First O
• Odd habit
• A kind of twitch
• A little jerk?
• Something strange
• ''___ Tac Dough'' (game show)
• Personal attribute
• Character part
• Curly hair or blue eyes
• First 'O'?
• Fixation
• Red hair or freckles
• X or O, in a game
• One may be expressed by a gene
• Brown eyes or blond hair, e.g.