I can't think of another way to pronounce the spoonerism though ;) It would have been better if at least one half had been the correct spelling and not just a homophone think.
The only one I can't parse fully now is 20D. I can get three letters from "is one busy" but then I'm confused about the last part of the clue really, what is left over does not mean busy either. Alternatively I can get a 3 letter abbrev for "end of the working week" from the second half but then can't work out the rest of the word from that.
It was one of the earlier ones I got though purely from the first part of the clue so :/