Well it didn't take long to finish once I decided to try one of my answers for 23d in the grid. Although I can't parse the middle three letters, it led me to the answer for 25ac. Gosh why didn't I get that sooner.
I tried a similar exercise in the north west corner and had soon filled them in. Initially I couldn't parse 4d, then the penny dropped. And the rest were a write in, though I can't fully parse them all - just spotted the anagram in 2d. Personally Rocky, I like the anagrams. Several I can't parse at all - 26 and 27ac and 17d and some I can only partially parse.
FOI was 9ac, LOI 16ac, CODs 9ac,14ac,24ac
Thanks for the explanation of Ninas, back to my ironing
Happy Christmas