Related Clues:

• Separate copper and posh chap
• Cease, as a mission
• About to smack, intercepted
• Call off at Cape Canaveral
• Clip of Partition?
• Check injury caused by knife, blunt
• "Call off the mission!"
• Go/no-go directive
• Stopped supply of surplus material turning up
• Part of shirt about to sever
• Mission-ending cry
• "Don't push that button!"
• To cancel a computer process because of (or to avoid) an error
• "Stop the launch!"