Related Clues:

• Ability to use words effectively introduced in school change
• Traffic produces invective — one must escape it
• Swap made by singular magician
• Longing to move to Cornwall, perhaps? Then shift!
• Give and receive (blows)
• Exchange; contactor
• On which Forsytes might be found to depend in City set-up
• Convert half-crown, for example
• Exchange engendered by humorist in school
• Coppers, perhaps, put on other clothes
• Circuit breaker; change
• Rod that turns on the power
• Mostly do well without knack of barter
• Traffic in English river going North
• Quickly travel North, then East, in traffic