Unclued lights (one of three words and one of two words, singly or paired) form three groups. Group 1 is three words of a kind; group 2 is two names and a title; group 3 is a name and part of a title. The word that links them must be highlighted in the grid.

        Across

8    Water sprite cut seaweed (4)

11    Man with publisher, old fool (5)

14    College has zero Asian money (5)

15    Laziness in Leeds is awful (7)

17    Welshman’s harp overturned (4)

19    Love poetry Auden’s beginning abroad (7)

23    Expelled journo pens adventure story (7)

24    In particle, track nucleus (6)

25    After dog, get a cuckoo...