I'm doing ok after two days, but slowing down now and don't want to give up.
I have the answer for 3a but can't see which cells in row 3 are empty and which are part of the 27 letter edge.
Further down, a further tip for 11a would be great. I assumed it was De?????ng with the middle five unclued but now can't see how that could fit with what I already have.