I see "claret" mostly in English fiction and thought they were weak-ass watered down red wines. It took #VincentPrice to explain that those California reds I used to enjoy, like #Zinfandels and #Barberas, are indeed clarets, but the North American custom is to refer to the grape and not the classification.
I'm sorry, #EvelynWaugh, #NancyMitford, #AnthonyTrollope, and #PGWodehouse, for believing for scores of years your characters could not handle real alcohol.