Possible Clues:

• Ordering option: porter brought round a trolley
• Not part of a set meal
• A learner had to acquire vehicle with plenty of options?
• Vehicle entering area delayed as course not set?
• Style of menu
• Separately priced — a vehicle coming in behind time
• Type of restaurant menu
• Claret AA replaced according to menu
• Like single menu dishes
• A wagon with beer brought round, offering a choice