Many thanks for a productive challenge Mattrom, honoured to prevail in such a broad field of clues. Enjoyed the clips, one of my early memories of school science was the Van de Graaff generator.
Congratulations jono, that would absolutely have been my choice too ... a really clever clue. Thanks mattrom for a surprisingly fruitful 5-letter word and the mentions in a very thorough adjudication!
I’ve been a dirty stop-out this evening, so will look at the clips tomorrow.