Related Clues:

• Second of three X's, perhaps
• Tex-Mex breakfast food
• Nervous movement
• Tic -- (tiny mint)
• Personality quirk
• Tic -- (mint brand)
• "Tic ___ Dough"
• "___-Tac-Dough"
• First O, say
• -- Tac
• A facial twitch
• Spasmodic twitch
• Muscular spasm
• Twitch in anticipation
• Twitch in analytical way