Related Clues:

• Like guns that shoot every time?
• Long stop Craig coming in suffers at heart
• It shouldn't be dangerous, but note: one false move ...
• Can't go wrong when pudding has some alcohol content
• Certain to succeed or certain to get discharge
• Infallible
• Designed to prevent accidents in the case of malfunction
• Exam result for my money is guaranteed to work
• Infallible, as a scheme
• Can't go wrong with this trick at Confirmation
• Sure to work
• This is why you won't get this as a security precaution
• Cheat, parking on the top - it's sure to work
• Not admitting failure of Foreign Office, given mostly historic evidence
• Certain of success