Possible Clues:

• Doctor is in the wrong when he is driving
• Auto Club patron
• One relying on car to run in damp
• One for the road?
• Traveller gets a bit wet crossing Dartmoor peak
• One driving round hill shrouded in fog
• Basically, this is what Schumacher is
• Driver with case of wet rot turned back
• Frenchman cooked risotto for one at the wheel
• Driver gets a little wet going round hill