I lit'rally fell asleep doing this puzzle. Not from lack of interest, but because it was after midnight and I was very tired. I don't think that's happened before. I got about half the top done, and then conked out. Frannie, like that old cobbler's elves, finished it up while I slept.
As I review it now, there were some entertaining clues in here. 2D: It's more useful when it's busted (BRONCO), 38A: Hated to death, say? (ANAGRAM) (I love these every time), and 58A: Kittens come in them (LITTERS), for example. And there were only one or two that made me say "Meh," like 1D: Frome and others (ETHANS).
The theme is a time-honored one, and there's a lot of it. Six symmetrical theme answers, and twelve words that can all precede the word "line." Not bad. And I'm especially grateful that the constructors clued AIRSUPPLY in something other than a musical way.
Overall, a nice Wednesday.