Kind of a nice little trick in this one! It took us over a half an hour to realize what was going on, maybe 45 minutes, but once we did, it was over in no time. We wanted JUN/IPER right away for 37A: Berry used to make gin, but it was quite a while before we saw exactly how to put it in. I mean, it seems straightforward (or, well... crooked...) now, but we weren't sure what to do with the rest of the across. Having the Downs turn into it, and creating capital cities with the parts, well, that's pretty damn cool. Plus, BOSTON gets in, which we like.
My favorite clue might have been 103D: It's been shortening for over 100 years (CRISCO). Very nice. 21A: Lump in one's throat (UVULA) didn't seem quite right, though. I mean, it's not really a lump. It's more of an appendage. "Lymph node," that can be a lump. But, of course, that didn't fit.
Hands up, who else put in "Overtures" for BARITONES (19A: Rossini's William Tell and others)? That really slowed things down in the NW. And I couldn't see the joke in 24A: Rush job? (ROCKCONCERT) until almost the entire thing was filled in. Heh. I blame it on still being a little worn out by the Saturday puzzle...
Overall, I liked this Sunday puzzle more than most Sundays. Sometimes it just seems like a chore to fill in the big grid, but this one, while definitely on the easy side (once you got the trick), was still clever enough to be fun.