Related Clues:

• First correct "Hollywood Squares" square
• First correct "Hollywood Squares" spot
• First "O" of O-O-O
• Start of a pencil-and-paper game
• First of three X's or O's
• First X, say
• Undesirable movement practically contained
• Movement of authentication
• Spasmodic muscular twitch
• Involuntary movement
• Convulsive twitch (of face)
• Jerky movement
• Convulsive twitching
• "___ Tac Dough" (old game show)
• Muscular twitch