Related Clues:

• Unaffected, normal in manner
• Unmixed with anything else
• Innocent, uncontaminated
• That's the normal way to give a turn a twist with a pound
• Nothing else can be simple with this
• By the sound of it, chased 'er up the back
• In the ordinary way one might thus give a turn a twist with a pound
• So a turn that's twisted over half a century is quite usual
• The twist of a turn with the half of a century in the nature of things
• Nothing odd so to get a turn to a half-century
• A turn is normal over a half-century
• It's quite usual for it not to be flat
• A turn with a half-century that's neither sharp nor flat
• A turn with a half-century not put on
• Seven, for one