Related Clues:

• Series starter
• First event in a series
• First game of the season
• Early game in a tournament
• Key, e.g.
• Game one
• First game of a doubleheader
• Curtain raiser
• One who says 'one club,' e.g.
• Heat
• First in a series
• First bid
• Eye or can follower
• Early heat
• Act before the headliner