Bravo. I balked a little at this one but it actually turned out to be an excellent puzzle.
I also wavered about 12a — a few possibilities presented themselves, and I’m still wondering whether there might be an alternative to the one I ended up with (and am pretty confident in).
I felt that an alternative, varying from what I take to be the answer only by the first letter (not a crosser), might also carry the definition ‘beats soundly’, though I’ve only found an account of it meaning ‘failures to succeed’.