I've just noticed that 5 down and 9 down have the same clue. I believe it is 5 down that is wrong. Could someone please give me the right clue for 5 down? Thank you.
20d: Zero hour: one stops behind to see result of nuclear bombardment? (7) b?h?i?m. The only word I can think of is bahaism which I'm sure is not right. Help would very much be appreciated.