Related Clues:

• Starter's alert
• "All set to go!"
• Fully ready
• 'Everything's cool'
• Done preparing
• Word to a marksman
• Word flashed at the beginning of some video games
• Query before a big event
• Quite ready
• Fully prepared
• ''Ready when you are!''
• 'I'm ready'
• ''All systems go!''
• "__, aim, fire!"
• '___ or not...'