A pleasant enough Sunday puzzle. All the answers along the outer edge were preceded by an understood "double." I'm not quite sure how the title corresponds to that fact, but perhaps it's something clever that I'm missing. The revealer, though, is clearer - DOUBLEEDGED (70A: Like some swords … or a hint to this puzzle's theme).
Before I got the theme, I tried "sawed off" for 1A: Like many shotguns ((double)BARRELED). How cool would that have been? (By the way, I am loath to give up the double letter in words like "barrelled," but I know it is changing. At least the good ol' New Yorker is still with me! And speaking of the New Yorker, I liked the reference to 38A: "The Man Who Mistook His Wife for ____" (1985 best seller) (AHAT), by contributing writer Oliver Sacks.) Another nice clue was 53A: Water checker? (DAM).
Did you wonder, like we did, about the RAMOS 21A: ____ gin fizz? Well, it appears to be a southern thing, so I was all ready to use that as an excuse for not knowing it, but it was invented in 1888, in New Orleans, so… that's kind of a long time ago. Another reason that I might not have heard of it is because it sounds kind of gross. Gin, lemon juice, lime juice (I know, sounds good so far, right?), egg white, sugar, cream, orange flower water, and soda water. It was, apparently, a favorite of Huey Long.
GELD (47A: Neuter) was a good one, but the other two on that line (EAP and CESTA) are less exciting. And it's similar, I think, to the "PLACENAME" answer yesterday, but somehow I like TITLEROLES (79A: Thelma and Louise, e.g.) much better. Maybe I just liked this puzzle better, so I was in a better mood by the time I hit it. That, maybe, and the fact that it's followed by the similarly clued BETTES (82A: Davis and Midler). We enjoy touches like that.
Finally, some very nice fill in here - CLEARTHEAIR (105A: Dispel differences), ELONGATE (45A: Stretch out), BOOLEAN (112A: Kind of algebra), HASBEENS (39D: Dimmed stars?), and others.