22a. Clue says: "autobiography - ..." and that hyphen is key. This has nothing to do with 5 down, its just an example. Louis Armstrong's 1954 autobiography was entitled 'Satchmo', which doesn't fit. But the question doesn't ask for that. Lol. Its another word for autobiography you are looking for. Personal memories of a lifetime.
14d He was a courteous, well behaved and gentle sort of a man.
libralady stuck on 14d, I think your 20a is incorrect. The 4th letter is a T not a U. I gave a further clue to earlier. Here's another: He'll hold the door open for you.