Cheers Ginge, nice surprise with so many worthy clues.
I agree, the greengrocer was a bit of a push as its very eponymous invention is because of the 's' in Plural/Possessive and I stretched it to a 't' in can't which really would not have been deemed or assigned as a greengrocers' apostrophe but more of a grammatical faux pas.
Thanks again and see you next week with a (hopefully) great word to clue