This puzzle originally appeared in the arts and entertainment magazine in my hometown. In that version, the Across answers relevant to solving the meta were starred, to help out those in the general public not clued into the difficulties of metas. Looks like I forgot to delete that one. Thanks for the feedback!
The meta answer is OVEREXTEND (Hint: Find a 10-letter verb). Five symmetrically placed Across clues are involved in solving the meta:
17A. Jeep Wrangler or Toyota 4Runner, e.g.: OFFROADSUV
29A. Kristin Bell's "The Good Place" role: ELEANOR
38A. March 21st occurrence: EQUINOX
47A. Program lister since 1953: TVGUIDE
64A. Place for your book or glasses, say: NIGHTSTAND
The puzzle was called "Going to Extremes." What happens if you "go to the extremes" of those five answers (in other words, their first and last letters)? From top to bottom, you get the letters in the word OVEREXTEND, a 10-letter verb associated with going to extremes that also satisfies the puzzle's hint.
Nice one! Was there a way to narrow down which long entries to use? I'll admit, I figured we'd use first and last letters and then started from the obvious long ones and the central one and intuited the other letters from there. Was there a step I missed that ruled out the other 7- or 8- letter across entries?
In the original version of the puzzle (which was made for print, and an audience that had arguably more novice crossword solvers than you might find on Crosshare), I had starred the clues for the 5 Acrosses that were relevant to solving the meta. All I did was remove the asterisks for this version, though in retrospect if I were to set the grid again, I'd either make those longer, or include some other mechanic to make them stand out more. (Though again, the title is enough of a giveaway that one should hopefully be able to poke around long-ish symmetrical answers to get it.) Thanks for the feedback and the solve! ;)