I agree, useby, about the quality of the clues, which has been undermentioned in preference to the smarts of the endgame. I don't have the puzzle in front of me right now, but I was tickled by the penult across clue and the 3rd of the 10-letter down clues. If I had the puzzle here, there'd be others and I'm sure other solvers would pick different clues. This puzzle, I suggest, succeeded on every level, beginning with the initially cold solve, moving on to the grid fill, which because of the word lengths was far less terrifying than I'd expected, on to the already justly praised endgame. A palpable hit!