If you want to clear the CloudFlare cache (for example to see a recently changed file), this can be achieved through the CloudFlare section of cPanel.
Simply click on ‘Statistics and Settings’:-
-: and then look for the ‘Purge Cache’ row. Click on the ‘here’ to clear the cache. :-
This will clear the cache immediately, however you may need to clear your browser cache in order to see the updated results.