Possible Clues:

• Porter, say, must keep a dray and available fare
• In accordance with ticket having freedom to pick and choose
• Sort of menu left next to a trolley in A&E
• Priced separately, at a restaurant
• Metal a car technician receives ordering items separately
• One way to take some courses
• One has several options as a muscle car's punctured tyre at the finish
• Knack wearing a thong offering a degree of freedom
• Priced separately, on a menu
• How some take courses