Solution: First-rate, in British slang - NYT Crossword

I got this in its entirety only from crosses, and still looked at it skeptically until checking out its etymology; TOP HOLE just made no sense to me for “First-rate, in British slang.” Turns out that it’s very similar in origin to top notch, both of them finding their roots in horse-jumping, where the best horses soar over the highest bar or rail of a fence, which is held in place by pegs in either a hole or a notch, sort of. I mean, pish posh, folks. Maybe you use “top hole” every day, but in my defense this is only the third usage in the puzzle since 1965. If you knew it then top hole, old chap!