Made good progress through most of the grid in one day, but now I've been stuck for the whole week. Everything is filled but for a few NW answers—11ac, 16ac, 2d, and the dreaded 4d—plus the one unchecked cell in 30d. I just have no idea how to proceed, as I've been unable to determine any details about the theme.
Anyone have any nudges to help me onto the right path?