Possible Clues:

• Beat
• Better drink, consuming last of lager before idiot
• Almost certain way through mountains will go beyond
• It's better to drink noisily, after dropping litre on a ship
• Go one better
• Be better than (another)
• 4 alongside river during drink gets better
• Excel, almost certain to succeed in examination
• Better old city parking, as on board?
• Be better than (own best)