I'm just not that clever and don't know the Bob Dylan song. Thanks to the hint from Chrise I've got 10ac, but it has thrown my guess for 5d. Fortunately, I've read all the Harry Potters, so got 16d.
I can't parse 25ac and 27ac, so may have the wrong ending for 17d.
So please can I have more hints for 5ac, 17d and 8d and possibly 6,26
I've just managed to google the Bob Dylan reference.