I couldn't agree more with the comments regarding the excellence of this EV puzzle and the poor standing, in comparison with it, of this week's Listener.
I do have one query, however, as I'm unsure of my own reasoning on one facet of the endgame. I've assumed that the 9 letter "definition" given by the central cells in the NE quadrant is making a reference to a significant female protagonist's membership of a social grouping recognisable for its nomadic lifestyle. It just seems a bit tenuous. Do fellow solvers concur?