for 28 the clue answer is 5 letter, so it needs "adjustment" to go in the grid. Trouble is there are two possibilities so you have to complete the endgame to know which is right. I'm still not sure about 18.
So nearly there on an enjoyable puzzle but I can’t find a suitable “adjustment” to use the letter I removed from 11A. I can see it must be in a blank unchecked square, but I have a full grid.