Odd theme today related to the NBA (48A: Org. whose only members with nonplural names appear at the ends of 17-, 25-, 410, and 56-Across). To tell you the truth, I'm not sure I could have told you that "Thunder" was the name of a team now. I pretty much stopped following the NBA a year or two after Kevin McHale started playing for the Celtics. They're still a team, right? The Celtics?
Theme aside, the long downs today were all quite good. CATALYST (4D: It makes things happen), GLITTERATI (11D: Fashionable celebs) (love it!), and even DISCOUNTED (25D: Not full-price) isn't bad. As a photographer, I have mixed feelings about ANSELADAMS (26D: Famous Yosemite photographer). He was a great technician, and developed the zone system and all that, but I'm not convinced he was a revolutionary artist. But then, they also serve who only stand and develop photos of lovely scenes, right?
Other interesting fill include ZOWIE (15A: "Holy cow!"), NERDY (60A: So unhip as to be hip, maybe) ("hip" and "nerdy" don't mix - they don't need to!), and GUAVA (45A: Exotic jelly fruit). Less than stellar fill include ILIAC, ANDI, IMA, and LTYR. I didn't include AERIE (39A: Place for a kiddie hawk?) because it had such a fine clue.
Overall, a decent Tuesday.