Late as usual: I got as far as we could, read all 100 posts (thank you all for various hints) and have almost finished. Stuck on 18d: s*a* b*a*, and can't understand 1d: end of clue is definition, fits 3 crossers, but how does the wordplay work?
FOI: 3, COD: 5, LOI will be 18 if I get some help.