Related Clues:

• Zero hour, e.g.
• Get the show on the road
• Come-one, come-all competition
• Not taken
• Square one
• File command
• A shot might indicate it
• Proctor’s instruction
• Premiere
• Crack ___
• In the clear for a pass
• Signer of the Camp David Accords
• Unrestricted contest
• Git-go
• 'Hit it!'