Thanks for solving Oliver! Ad infinitum, meaning without end (in retrospect, I dislike this clue; it feels like a stretch).
I'm not sure about F's legitimacy as an abbreviation... But in an academic context it certainly denotes failure. I really appreciate your feedback!
Oliver Hardy 🤓7:50 · 2024-01-17T14:01:08.409Z
Sorry, my comment should have "an abbreviation" instead of "a synonym".
Whoops! Put ON END in for 5A's "ad infinitum" instead of the correct answer, and that kept me from getting 1D for far too long. I love the tone of 2D, I find 1A to be the right sort of absurd surface, and 4A is succinctly clever. It all looks good, keep it coming!