I stumbled across this rather funky plugin today: Dehaze Slider for LR6
It’s a fully functional dehaze slider for LR6, and it does exactly what it says on the tin.
Simply extract the LRHaze.lrplugin folder to your Lightroom program directory, go File>Plugin Manager, select Add, browse to the plugin folder, select it, and, well that’s it!
Directions for use are on the author’s page- Enjoy! And don’t forget to leave him a thank you!