Thanks to Fed.
I had some trouble with this. Despite the presence of a few extreme "gimmes", I took a long time to finish and many clues required long thought.
I'm tired this Friday evening. Might be the fatigue, but I didn't enjoy this quite as much as most Fed (of whom I'm a fan) puzzles.
FOI 4. LOI the combination of 22 and 29 (due to an error in 29 that held up progress).
Can't pick a COD right now, but the long list is: 18, 30, 24, 10, 1 and 5.
22 might be clever...answer is obvious from crossers but I'm not 100% sure of parsing.
Wondering if there's a theme or some kind of feature...two pairs of neighbo(u)ring across solutions contain hidden words, but that could be coincidence.