I wasn't sure how many clues you were supposed to give for a meta, but hopefully even non-meta solvers (like me) can figure this out without it being too obvious for others.
SOLUTION: SODA. The multiple soft drink references and/or the title of the puzzle should have pointed you to 1-Down. If interpreted like a crossword clue location (i.e. 13-Across, 22-Down, 7UP, etc.) you find SODA from reading ADOS backwards, starting at the 7 (S) on the grid.
Now that I see it I'm smacking my forehead for missing it
V1H 🤓34s · 2021-07-06T05:46:05.622Z
I had to step away from the puzzle but knew that the title was a clue. Didn't know what 7up had to do with anything but then realized that since there was no 8 down, maybe I could go up like 7 up. Then I saw it. Nice job with this meta.
It's a bit of a stretch. The reference was supposed to be that there were in fact nine "answers" in the grid because of the addition of 7-Up, so you still had eight answers to go after solving 1-Down, not seven as one might initially expect, but it didn't land as well as I wanted