Hey there, Michael Parker11.
We understand you're wondering how to clear the cache in Safari with macOS Big Sur installed.
Clearing the cache and browsing history can sometimes help when you encounter issues with Safari: Clear your browsing history in Safari on Mac If you let us know what's going on with Safari, we could try to provide more targeted troubleshooting steps. This article might be helpful to you as well: If Safari is slow, stops responding, quits unexpectedly, or has other issues
As for clearing the cache, you that can be done by going to Develop menu in the menu bar > Empty Caches. If you don't see the Develop menu in the menu bar, you can change that by going to Preferences > Advanced > then check Show Develop menu in menu bar.
We hope that helps. Take care.