2613: Way off
The unclued lights (one of two words), all verifiable in Brewer, precede a word which appears as an abbreviation four times in the lower right-hand quadrant of the completed grid. Solvers should highlight all four examples. Ignore two apostrophes. Across 1 All omelettes cooked with pesto and chives, first (8,3) 7 Furtwängler finally reveals this