Boy, I don't usually talk about trying to solve as fast as possible, but if I could type better with my thumbs, I think I could have been at least a minute faster on this. It put up absolutely no resistance. I'm guessing Colum has a good chance of coming in under four.
The theme of PRIVATEPARTS (55A: What unmentionables cover … or what 20-, 27-, and 44-Across all begin with?) is just fine, if we accept the commercialism of HIDDENVALLEY (20A: Big name in ranch dressing). And while we're on the topic, salad dressing is the easiest thing in the world to make yourself, and it takes less than five minutes. I know that at least two of our regular readers already make their own, but for those of you who don't, just save a jelly jar or something similar, clean it, then pour in oil, vinegar, mustard, salt and pepper and shake. You can change it up however you want - different vinegars (sherry, champagne, apple cider, balsamic), add a little lemon or lime juice, a few spices or herbs… the possibilities are endless. And if you want ranch, just add a little mayo or sour cream, some onion and/or garlic powder, and go from there.
Where was I? Oh, right, the CREOLE (17A: Louisiana language) CLAMBAKE (18A: New England cookout)… sounds great! Where do I show up?
EDUCE (24D: Bring out) is a nice word. PICASSO (42D: Painter with a Blue Period) is always welcome. BARHOPping is fun.