I was going to have a moan about the first word of the clue to 4d, but Chambers gives it as an obsolete alternative to 'alternate'. However, I'm still not happy with it.
Enjoyed all of the misdirection. Makes the puzzle a challenge without being arcane. COD 13 - I really liked “what gets barrister going” for first letter. I haven’t seen that before.
A great puzzle with some ingenious wordplay. After some rapid progress, I got stuck on the NW corner, and only solved the LOI of 10a with some guesswork.