Possible Clues:

• Changing to make something more current
• Making current
• Ulster Protestant leader is going steady and that's refreshing
• Giant pud crumble is refreshing
• Refreshment
• Changing to more modern, out-of-bed sort of romantic activity?
• Doing some revision at university before having romantic appointment
• Modernising, find new use for a dung pit
• A dung pit removed during modernisation
• Modernising university with little money, and going steady