Possible Clues:

• Railway engine
• Get fit to get wet at last on line
• Tons managed to keep current and become physically fit
• Erstwhile campaign vehicle
• Locomotive plus carriages
• Get fit to get wet at the bottom of this
• Get fit to be on line
• At last wet the tea for the journey this way
• Teach it to be precipitated at last by rail
• Coach a few of them