We worked from bottom to top on this one, and a nice ending it was, with MUGSHOT (8A: Picture with a number), EQUATOR (15A: Where it never gets above zero degrees?), and USOTOUR (16A: One going around the bases?). Quality stuff, all. I think we might have been delayed up there by errors such as "pair" for 1D: Go well (with) (MESH), "eggs" for 19A: Greasy spoon order (HASH) (mmm... hash... and a much better answer than "eggs"), and "entrap" then "ReelIN" for 22A: Successfully lure (ROPEIN) (successfully lured, we were!). Also, CARTOON (23A: Kind of figure) eluded us until the crosses forced it, and we tried "cHarOn" for PHOBOS (32A: Moon of Mars). (Knew it was out there somewhere... but it's actually a satellite of ex-planet Pluto!)
This was a very clean, enjoyable puzzle. A pair of "unreal" clues, some nice long-ish stuff in CROPLAND (42A: Much of the plains states), USERNAMES (9D: Handles online), and CASHCAB (4D: TV game show on the Discovery Channel, 2005-2012). Not much to complain about, really. As we've stated at least a few times, we love seeing EEL (38A: Electric ____) in the grid, and STET (37D: Leave in), ANTE and ANTI, well, you'll have that.
If you haven't seen Google today, they're celebrating the 100th anniversary of the first published crossword. This review is being posted late in the day, but all of their special headers are collected somewhere over there. If I think of it, I'll post a link tomorrow.