Spanish nobleman = don and crew = eight (sounds like, so ate).
Rugby player = prop and haka = rite.
I've finished apart from the (10, 8) words. I thought they might be mathematical terms but that would have to be (11, 8). It seems I have to take the amended letters in clue order and form anagrams and to be honest I can't be bothered after having spent so much time on it already!