Having stumbled over the line I'm now doubting my final thematic entry. I thought I'd cracked it but I'm struggling to add the single vertical line to make sensible words. I thought the entry must be very famous and quite 'rocky' but it doesn't work with the single line and, possibly, with one of the longer down answers.
I've tried all the right number of letter options in my Bradford's I think.
I know there's a ? over a dodgy plural involved.
So near, yet so far. 🤨