We enjoyed the theme of "really" variants. It reminded us of our as-yet-unperformed play in one act called "Hello." It's kind of hard to explain, without creating a whole crossword grid around it, but take our word for it, it is similar in theme, but much more involved and way better. (Just kidding, Mr. Sessa!)
1A: Venomous African snake (MAMBA) was a gimme, because we caught a documentary about the black mamba snake (and the woman who hunts them down) twice in the past year or so. Never watched it all the way through, but watched it enough to know that their kill rate, without antivenom, is 100%. Not a serpent you want to mess around with.
Anywhoo, what else... Did SAAB (10A: Former Swedish subsidiary of General Motors) buy itself back? Who knew? Another thing we learned from this is that I am a fire sign (14A: ARIES and 36A: LEO) (I'll leave it to you to guess which one). To that I say, as 16A: Krabappel of toondom (EDNA) would, "Meh."
I liked NOTBYAMILE (33D: "Wa-a-ay off!"), but not NSEC (65A: Tiny time interval: Abbr.). Also liked the CRABBY/CABBY combo. It was fine for a Wednesday. Nothing earth-shattering, but not bad.