I have the "items behaving thematically", though they required a lot of fiddling with some ambiguities in the removed letters. I have the Start and Finish, for once not too deeply hidden. I have all the potential affected squares, and therefore not that much to choose from in respect of the 14 letter connection, which nonetheless remains opaque. I have the 4 words that are wordplay only (I think) but very little idea of what to do with them, or how three numbers (perm any three from 4) might represent a celebrated drawer. I'm almost certain that the title is a bit of a red herring, or at least is not as direct as it might be. Perhaps light will dawn, perhaps it won't.
Be that as it may, I'm off to get some Friday night fish and chips, maybe watch the footie or the wonderful Paralympics, and not worry too much.