Excellent grid but very niche knowledge, certainly defeated me :(
To be honest I think this is more than medium difficulty for most people.

Uri, Nate ?

ExRanger, I'll admit that Urinate was not my, er, #1 choice. Got a suitable replacement?

nighttime, thanks for the feedback. I guess it's always tough to figure out where your own knowledge isn't common. In truth, I had considered replacing backhand with something else because it was too easy. I am guessing someone in Minnesota etc. would find this far easier than someone in, say, Alabama.
Without a spoiler, can you give me a word from a category that you think is too niche?

Very clever, a bit beyond me tho. TY