There is neither a 'P' nor a 'U' in 7a. 3d is not Burkah.
You need to check 19a - there is no 'M' in the middle of 13d.
18d - think of Barbara - it will lead you to the answer to 12a and 17d (and apart from the 'e' the letters you show for 17d are also wrong - you need to check 19a and 25a)