Related Clues:

• More than a twitch
• Certain X or O
• Half a mint?
• X-X-X part
• ___ Tacs (breath mints)
• Knee jerk, for one
• Facial twitch
• Muscle movement
• First ''O'' of O-O-O
• '-- Tac Dough'
• Cramp
• First correct ''Hollywood Squares'' square
• Start of a winning combination
• Some kind of jerk?
• It can't be helped