A good if slightly easy prize crossword on the whole – thanks Pangakupu! – though like others I was somewhat befuddled by the parsing for 23d: I could partly see what was going on, but not fully. However, in a light bulb moment I have just cracked it! It parses as 2,2 where the first 2 is a common 2-letter written abbreviation for a certain 6-letter word; and the second 2 is another 6 letter word with 4 letters removed (indicated by the latter part of the clue).