Thanks x_word_fan.
But I am not clear on what you mean.
I have ?I??????I???.
So CENTRAL would not fit.
Middle may fit at the beginning but what is the parsing?
On the crossword solver site, someone has said that the original answer has 7 letters and is thematically treated to get 12 letters. Unfortunately I don't know what the thematic treatment should be.
I'm finding this quite tough.
central seems to fit at the right hand end of 11a so far to agree with crossing letters of 5d and 9d. What happens later ...not got that far yet.
12d and 46a are also too short for the grid , but only by one letter......
yes hankir you are correct with your letters and i think the 5 letter answer you have ......look at the 2nd and 3rd letters of your 5 letter answer.....google ... things may become clear as to what has to be replaced by what??....
if you have the clue answer for 13d (could be seen as 3 words and defn is practical treatment) ... then change letters 5,6,7,8 although 8 will be the same after the change