Think it's Cassius Clay and Constantinople, but apart from spelling slips a nice grid.

Nice grid, i agree with weegieman though.

Very nice I didn't solve love a challenge!

yup, I wasted a bit of time checking whether the misspelling was actually a category

Not sure I’m happy with midget gems as a name change

Lyon’s ( the original ones ) are still called midget gems
Maynard ( the ones with the wrong flavoured black ones) are still called midget gems

Only the squishy pale M&S knock offs have changed their name so for that category to work for me it would have to be M&S midget gems.

Ditto to the previous comments about spelling

I'm normally borderline pedantic about spellings so sorry for the errors... mis-spelling as a category might open up a whole new can of worms.