Related Clues:

• Available to purchase now
• Done preparing
• Word to a marksman
• In attendance
• Word flashed at the beginning of some video games
• Query before a big event
• In inventory
• Fully prepared
• ''All systems go!''
• "__, aim, fire!"
• '___ or not...'
• At one's disposal
• 'You good to go?'
• Prep
• Willing and able partner?