Is it possible to show ONLY the clock on the HTC Home plugin?
 

I don't really use the other Icons such as the Weather, Media Player, Profiles, and Contacts. They're just taking up space. I installed the Home Customizer, but even with all the Icons unselected, it still shows the Home button.

It's not possible. Do a search here for rltoday as there are some skins for it which mimic the HTC Home clock.