Caste mark

When I read a crossword clue that said “Napa excursion” for eight letters, I immediately thought “parts run.” The correct answer was “wine tour.” I should have known; this was in the New York Times, which is not generally considered the news source of record for America’s grease monkeys and shade-tree mechanics, especially since the demise of the Saab, which company I believe made it a policy to exclusively employ philosophy PhDs or published poets in their service departments. Plus, their three-cylinder engine would actually run backwards if you hooked up the wires wrong. And adjusting the valves was challenging.