I've got the answer to the seminal clue, i.e. 13d and 20 a, but I'm blowed if I can get the idea of all the many clues referring to that answer. ( I think 13d and 20 acroos is "ask a stupid question") I've also got 5d and 19d, but that's all. Any help, especially with all the linked clues,would be very welcome. 14 across, male and female into selective killing,stuffed, 4-6, might be ??a?-full, as cull could be selective killing.