Related Clues:

• First of three game X's
• Idiosyncratic twitch
• Check mark*
• Antichrist hides nervous twitch
• Muscle convulsion
• Part of OOO, in a game
• The X of X-O-O in a losing game
• Syllable before 'tac' in a game
• '___-Tac-Dough' (game show)
• Game's first X or O
• Brief moment for twitch
• The first 'X' of X-X-X
• *Strategic maneuver
• Verbal ___
• Recurring habit