Think I've finished but two I am not sure why:
(1ac) The answer could be 16..or 104. p?c?s - I have packs but cannot parse. 104 is two packs of cards? Can't see how 16 fits ( answer to clue 16 is reposte)
9(4ac) Prudish, in the main, about the shade s?p?a which I am fairly sure is sepia but why? Is the main referring to the sea?