When I saw this on Saturday, I was nearly frightened off by the format. Saved it and started yesterday. I'm glad I did, because some of the clues are exquisite. I'm completely in awe of solvers who say they can guess the theme and the dedicatee before thay even start solving. Although I have about 2/3 of the radials and 2/3 of the arcs, only have 1 definite misprint, so no Idea of the theme. 30r is given in full by the wordplay, but only the first 4 letters are in my BRB. I hope I'm right to believe that it involves a vague knowledge of a plural formation in another language and that I have the correct 3 letter interpretation of "go". No idea of the Mass. authoress. Is it also a book title? Still cringing at my repeated rejection of the answer to 7r, because of a failure to spot the definition + ? . I think 1 a might be misprint, but not sure. I'm hoping the donkey work I've put in on it will pay off, and that it might involve another 22a with the same profession. It appears from the comments here that I need to have an intimate knowledge of the names of all those involved in the compilation of the Listener, which I do not. Was one of them called Arthur? Is there a recent anniversary I've missed. All very vexing, but also very, very addictive, engrossing and entertaining, so worthwhile even if I get nowhere near the PDM(s).