After correcting my error and completing the grid, I took a look at the shaded and circled squares. The shaded squares contain a multi-letter spell-out of the single circled letter that follows. EYEINTHESKY, for example. WHYYOULITTLE naturally brought The Simpsons immediately to mind. :)
I enjoyed a number of the clues as I went along, including "Undergraduate's declaration" (MAJOR), "Attire for the Mario Bros. or the Minions (OVERALLS), "Butter unit" (PAT), and "What can barely give a hoot?" (OWLET). Speaking of which, earlier this week I dug up my Harry Potter books to lend to Huygens, but for some reason started re-reading them myself. I finished the third book, HP & the Prisoner of Azkaban, tonight. I think I'll stop there, but who knows? The series seems to have cast some kind of spell on me.
I liked the 2 sets of 3 9's in the northeast and southwest corners. Has anyone ever used their HOTELSAFE? Maybe only in a Nero WOLFE novel. And speaking of hotels, I appreciated all the non-English answers: olio di OLIVA, EAU, ARC de Triomphe, TIA, and of course ELLIBERTADOR, once I got his eye in the right place.