In the image below I applied -65 of texture on just the skin, using the brush. In the Brush tool (and linear and radial filters) there is a new Soften Skin (Lite) preset that uses both negative texture and clarity – so do experiment with texture alone and combining it with clarity.
Texture vs. Clarity and Sharpening
As you can see in my video tutorial above (which I recommend!), sharpening enhances edge contrast in a very narrow way, by default only one pixel out from an edge, with the purpose of making edges look crisper. Depending on sharpening settings, edges of all details are candidates for sharpening, including edges of noise and other artifacts. Texture focuses on medium size details, not fine detail, and contrast is increased/decreased further out from edges than sharpening. With this contrast enhancement Texture makes objects and your scene look more three dimensional and brings out texture (or reduces texture) in lower contrast surfaces. Clarity focuses on larger elements than texture, and enhances contrast much further out from edges than texture (depending on Clarity setting used). In terms of what order to use them in, I recommend applying Texture, then Clarity while doing your basic tonal work (along with Light controls), and leaving sharpening to be the last step in your workflow.
Texture and Process Version
Applying Texture will automatically update process version 3 and 4 images to process version 5. The Texture slider will not be available in the Basic panel if the image is in process version 1 or 2 – first update the process version by clicking on the lightning bolt below the histogram.