nice! Way to work in longer clues that make sense!
One tiny thing...the main output of the Krebs cycle is NADH, which later, in most eukaryotes, drives the electron transport chain to produce ATP in a different step that can be uncoupled in some conditions. I mark my students wrong for that all the time and they'd flip out if I didn't mention it here haha. A tiny bit of ATP can be generated in the Krebs cycle, but the main output is NADH, followed by FADH2.
It was a cool puzzle! I have just been conditioned to react that way to that comment lol ignore me if you wish.
Haha thank you for solving and thank for the info! It’s very important to learn something new whenever you can. I will do my best to reflect this new knowledge in future puzzles (and by correcting that clue)!