5a What machine gunners do seconds after bomb . Ans is strafe which is indeed what they do but if seconds =s then problem is that trafe doesn't seem to be a word.
6d he's big in Africa and may charge money . Ans is rhino which is indeed a large African animla which might charge at you. But where does money come in please?
14d Obsolete due to a silly posh guy nearly parting. Ans is out of date =obsolete. Out of date is partially an anagram of "due to a" leaving o f t but just can't get those letters or the reference to "posh guy nearly parting" .
Thanks