Related Clues:

• Gas stove light
• Main event preceder
• Bar accessory
• Start of a serial
• First of a doubleheader
• Trilogy starter
• TV tryout
• Starting bet
• Story opener
• Starting bid
• First episode
• Highest-ranking, in a way
• A letter opener
• Doorknob or handle, e.g.
• Starter for Aristotle