I got the skinny on this theme about midway through. When I first started the puzzle, the flashing info icon in my app had me worried that I would need to see the print version to complete it, but I didn't. I was able to visualize the theme answers by narrowing my eyes. :) My favorite today might be [narrow]ESCAPE, although there was a time when I loved a [thin]MINT. I am not a fan of [skinny]JEANS.
In other news, I first entered bIg for 4A. (Lead-in to toe or top). It works, but it wasn't correct. Ha! I finally got TOOKHEART at 4D, so the big toe was marched right out of there.
When you see the word AERATE, do you think of that Simpsons episode when Mr. Burns leads the power plant staff in calisthenics? "Raise your right hock. Aerate. Raise your left hock. Aerate." Good times.
I hope Horace both got and enjoyed 46A. Writing on many a chalkboard (MENU) because that's just what he uses at home to list the dinners for the week. I enjoyed 32A. Pickup line? (RAM), 28D. French well (BIEN), and 30D. Museum piece (RELIC). It's twice now we've seen THRICE.
There were a few answers I was SARI to see, including 1A. Cable channel owned by Time Warner (TBS) and 7A. Countdown abbr. (HRS), which were kinda BLAH, but otherwise I think the puzzle URNs an OLE.