Related Clues:

• Convulsive spasm
• Periodically tugging on one's ear, say
• ___ Tac (breath mint)
• Breath mint word
• Throat clearing, perhaps
• Uncontrollable spasm
• Habitual response to gum without protection?
• Sign of nerves, maybe
• Minor physical problem: temperature very low?
• Start of a paper-and-pencil game
• Personal hallmark
• First of a game's three-in-a-row
• Apprentice hides nervous twitch
• Latter half of erotic spasm
• Nose scrunching, e.g