The Safari browser does not have a built-in method for clearing its cache, but you can do the task by following these steps.
1. Open Safari on your Apple device.
2. Go to the Menu bar, select Safari and then Preference.
3. Next, select the Advanced tab and tick the box next to the Menu Bar's Show Develop Menu.
4. Click the Empty caches option from the drop-down menu once the Develop Menu has shown up in the menu bar.
Read more for Info: https://softfind.net/chrome-net-internals-dns/