Phew! Really difficult this week I think.
I think I've got it but I'm still not happy about 16A. Am I correct in thinking the first part is what you could do with a coin or a pancake?
Wally - the trackword gets easier when you spot that it contains a 5 letter word meaning "madness" or "craze". And the full answer starts with an X!
Jazzgirl, you seem to spend a lot of time in your garden. You must have better weather where you are than I do. And, no doubt, a nicer garden!