Fun and fairly straightforward today.
It's still early, but later in the day I want help parsing the theme clue - 2d. I note the grid has a 'central square' and expected to find something there.
Completed 3 of the 4 grids but the NE is eluding me. I have 9a but can't break into the rest. Need to get on with some jobs so would like to put this to bed asap. Appreciate any 'nudge' (not answers please) that would help me make progress in the NE. Many thanks.