I think I’ve got all the answers in now but the accommodated cells don’t form a clearly-defined arrow shape. They may be said to point to an X to the top left, but with an adjustment to the letters in row 9 (and 8) they could point to the X near the bottom left corner.
The grid as I have it is an ugly mess, defying all the normal principles of crosswords. I can see why some of our posters have wanted to give it up as a bad job. Unchecked cells with three letters in, not contributing to any message: surely that shouldn’t be allowed. And a feature which I don’t think has been mentioned is letters spreading over two cells each, though I have seen that before. The same thing could happen at the bottom of column 6 and the top of column 7, but there would be no point in that.
This surely can’t be right, but I can’t see any other way of fitting the answrs in.