Related Clues:

• Word preceding a gunshot, perhaps
• ''Don't take another step!''
• Stop temporarily
• Parade-ground command
• Cop call
• Restraining order
• Drill order
• ''___! Who goes there?''
• Cop show command
• Pull up
• Stop progressing
• Troop command
• "Stop right there!"
• Put the brakes on
• Gatehouse cry