Can I take it from your post Bunty, that you've entered your solution online and KNOW that 16a is Ball and not Bawl?
It's such a bad clue that I've been waiting to see if anyone posts, so I can decide one way or the other.
My understanding of 23a is that Kipper is used to mean "to kipper" as a verb meaning to cure - rather than as the noun 'kipper' which wouldn't be clued merely by the word 'cure'. I hope that makes sense!