In Microsoft's Edge browser, included in Windows 10, clearing the cache is done via the Clear browsing data menu. Once open, check Cached data and files and then tap or click Clear.
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The fastest way to the Clear browsing data menu is via the Ctrl+Shift+Del keyboard shortcut.
Another option is via the Settings and more button (that little icon with three horizontal dots), followed by Settings and then the Choose what to clear button under the Clear browsing data heading.
See How to Clear the Cache in Microsoft Edge [support.microsoft.com] for more extensive help.
TIP: Tap or click Show more while in the Clear browsing data menu for additional items you can erase while clearing cached files and images.
To delete cache files from the Edge mobile browser, go into the menu using button on the right side of the menu, and choose Settings. Go to Privacy > Clear browsing data and choose what you want removed; you can pick cache, passwords, form data, cookies, and more.