Had some time on the train and decided to make a (non-cryptic!) mini! There's one slight twist in this that I'm not sure if I need to directly address or not, but it was the idea that spawned this puzzle
Thanks for solving! S Club 7 was a British pop group in the 2000s, they're not super well known outside the UK tho so it's kind of niche in that way (or at least they're not in the US, where I am - not sure about the rest of the world)