I'm sure this was a difficult puzzle to construct and reflects a lot of hard work from the setter, so thanks as always to Cagey. Personally I found this jumped straight from too difficult to too easy! At first I thought it would be a DNF, and then with a few guesses and a fortuitous google, it was all over. I've understood the down clues and a couple of the across ones, but I don't understand the order or how the definitions were affected. It was interesting how difficult I found the down clues - the solver has much less to go on when they only partially understand one half of the clue!