Related Clues:

• Sign of nerves
• Muscle contraction
• Involuntary twitch
• Recurrent twitch
• Bid first
• Eccentricity
• Began the bidding
• Began playing on Broadway
• An X could represent it
• Little jerk
• Peculiarity
• Involuntary muscular contraction
• Game opener?
• First X
• Made the first bid