Cloning your site is just another degree in how to fix hacked wordpress which can be useful. Cloning simply means that you've backed up your website to a completely different location, (offline, as in a folder, in order not to have SEO problems) where you can get it at a moment's notice if the need arises.
It is not uncommon for blogs to suddenly be hacked by a random person. Actually, even entire domains get hacked. If you are not a programmer or a programmer, there is not any way you will actually understand anything about codes or programming languages. This is the main reason why some of the people who do not know anything about codes wind up thinking if there are some methods to safeguard their sites and investments.
One thing you can take is to delete the default administrator account. This is critical because if you don't do it, a user name which they could try to crack is already known by malicious user.
As I (our fictitious Joe the Hacker) understand, people have way too many usernames and passwords to remember. You have got Twitter, Facebook, your online banking, LinkedIn, two site logins, FTP, web hosting, etc. accounts that all come with logins and passwords you need to remember.
But realize that online security is something you really need to start thinking my response about. Do not only be the reactive type, consider action to start protecting yourself. Do not let Joe the Hacker make your life miserable and turn all in creating come crashing down in a matter of moments, that you've worked so hard.