Related Clues:
- Like certain investments
- Can't go wrong when pudding has some alcohol content
- Infallible
- Infallible, as a scheme
- Can't go wrong with this trick at Confirmation
- This is why you won't get this as a security precaution
- Putting zip on the line
- Cheat, parking on the top - it's sure to work
- Not admitting failure of Foreign Office, given mostly historic evidence
- Certain if left and right swapped, the other way up is the same
- Completely safe
- A pudding and its eating? It's sure to go well
- Infallible pudding and its eating?
- Money-back, maybe
- Take in coppers -- cover is solid