Evening each, though given the time that I'm writing this it should be good morning. It must have been somewhat easier than usual considering that I managed to finish it with a little help from the thread. so thank you folks. Though having said that, isn't it always the way the ones I find easy others don't and vice versa.
Re 11D, in or on. The word "male" in the clue points the way. It's always female animals that are "in" heat/season/oestrus, though having said that, I took an inordinate amount of time trying to make sense of the word "onat"It's late. Good Night.