I think I've gone horribly wrong, as I have 3 crossers for the 6-letter down 4th across from top left, ending in 3rd letter of 1a, and I can't fit an A in anywhere for an unused pairing. Aaargh.
And can anyone offer a gentle nudge for my two unsolved 8-letter clues: the second one, about Ukraine, and the 6th from last, involving sculpture. I have places for both in my empty SE corner, but no crossers or ideas. (Have checked the name of the literal smallest state, or oblast, in Ukraine, and it doesn't seem helpful!)