Thanks for the guidance and I'm almost there. Missing bits are:
The clash that provides the A,
18a, why would you go there before the bench?
39d looks like it can only be one thing but parsing?
42a - parsing. The Aussie bird is obvious but...
Needless to say, I don't seem to be on the same wavelength as Poat! Back to my comfort zone with Azed I think!