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 wood (3)

11    A few words from Romeo in poor shape (6)

13    Athlete swallows one more fluid (7)

15    New name given to one strait (5)

16    Look in morass for criminal (5)

17    Tufts of wool giving female bad colic (6)

18    Damage ground, parking in it (5)

20    Waterweed from East Anglian...