Thanks to Everyman. I found this a quick solve, with some good clues. FOI 8; LOI/COD 19, also liked 16, 20 and 12. I also finished the SW quadrant last, but it wasn't a terribly long holdup. Solid puzzle, maybe a little easier than the norm, but not a standout IMO. I didn't notice a theme or rhyming pair. There
is a remarkable feature common to the three longest solutions, but I can't be more specific because of potential spoilers.