Many thanks Chris for your explanation. I can see why you are so cross. It didn't spoil it for me as I'd got the answer albeit not an accurate synonym for clear. I think I've finished so thanks for all the hints above, but I cannot parse 20d.
My FOI was 16ac. My LOI was 25d if we don't count 20d, though I don't like the use of Latin plurals in crosswords. My CODs were 11ac, 1,21, and 2d. I didn't find it very straightforward - too many odd clues like 19ac, 14ac, 6d (I wanted to put in tandem!) and 20d. I was very puzzled by the parsing of 3d, though I think I got it in the end. So not a totally satisfactory solve. On the plus side my husband is back cooking dinner on a Saturday evening (I do the other six days) so I can concentrate on the crossword.