How to import the impressive "clarity effect/preset" from Lightroom to Premiere

It isn’t possible to directly transfer features from the photography applications to the video applications. However, it is possible that Clarity might some day be added to the video applications. Clarity is in a category of adjustments that is adaptive, like Highlights and Shadows, so they require more processing than simple sharpening or contrast. In Lightroom you are processing one frame, but that additional processing can add up to a lot more rendering time for thousands of high resolution video frames, so that is why you don’t see all of the still image features in video editors.

However, Premiere Pro did add Highlights and Shadows adjustments to the Lumetri Color panel. That suggests that it might be possible to add adjustments such as Clarity and Texture later. If you want them to be added, you should create a Premiere Pro feature request in the Ideas tab in the Premiere Pro community so that others can add votes. But first you should search to see if someone has already requested Clarity, so that you can vote it up. It looks like you also posted there, but not as a feature request.

AFAIK, not possible; totally different applications, data, processing color space etc. 

You might ask in the Premier forum but I'd be shocked if this is even close to being possible for the reasons above and more.