Well, brock, I found that very tough going, and I don’t know what our friends across the Pond (belatedly happy Thanksgiving, by the way) will make of one or two of the clues. Got there eventually though, and enjoyed the challenge.
FOI (somewhat desperately) 15d
LOI 5d, which I guessed much earlier but couldn’t parse, and I’m still not entirely sure as my parsing depends on a dubious abbreviation.
COD? I’ll go for 6d because of the amusingly (to me) risquê surface.