Even reading the comments in this forum, it took me a long while to get the point of 20a, partly because I didn't understand the significance which people were attaching to the dash, but once I saw it I thought it was a very clever clue. Clever, but not to my liking, because its difficulty is way disproportionate in this crossword puzzle. All of the other clues were fine, and despite the average level being on the easy side, there were enough more demanding clues to make it enjoyable. Thanks, Philistine, if you read this. My COD is definitely 6d, and 7d my runner up.