After a lengthy struggle I'm left with 2 which are driving me nuts:
17ac and 23d.
For 17 I have the crossing letters and have taken note of what little's been said about this earlier but still no joy : Is the definition at the beginning or the end? A nudge hugely welcome.
With 23 I've checked all lists of what I take to be the definition and found nothing that fits the bill. I'm pretty sure of the two letter addition in the first cell and that there's another somewhere and i have the first letter of 26 ....