Almost fnished, Tues pm: ìt's been a busy couple of days!
Used crosswordsolver for a couple, read the forum, still couldn't solve 13a even with 25 solved and all4 crossers. Then told my husband about the Nina and theme, which I hadn't noticed but shich helped me get 26d, and he suggested the 2nd letter of it, after which I solved the whole.
Some very clever clues here! Thanks, Brockwell, if you're still reading.
Foi 12a
CoD might be 25a
LoI was 13a