Related Clues:

• Deadly accurate, always on the mark
• Can't be misinterpreted, even by simpleton
• Without deviation
• Not liable to mistake
• Always right or accurate
• Rung with Erin, and no mistake!
• It's all right to be round the end
• Like guns that shoot every time?
• Can't go wrong when pudding has some alcohol content
• Certain to succeed or certain to get discharge
• At last you can see necromancer call up dead
• Infallible, as a scheme
• Impeccable organisation takes head off cured fish
• Can't go wrong with this trick at Confirmation
• Sure to work