WordPress cloning, as it applies to fix malware problem, is the act of making an exact copy of your WordPress install. What is good is that with the correct software, you can do it. There are a lot of reasons why you might want to do this. Here are just a few.
There are numerous ways to pull this off, and a lot of them involve copying and FTPing files, exporting and re-establishing more and databases. Some of them are very complicated, so it is imperative that you go for the one that is right. Then you may want to look into using a plugin for WordPress backups, if you are not of the persuasion.
Should you ever want to migrate your site elsewhere, such as a new web host, you'd be able to pull this off without a hitch, and also without needing to disturb your old site until the new one was set up and ready to roll.
You can also create a firewall that blocks hackers. From coming web link to your own files, the hacker is prevented by the firewall. You must also have updated version of Apache. Upgrade your PHP also. It's essential that your system is always filled with upgrades.
Implementing all the above will take less than an hour to finish, while making your WordPress website considerably more immune to intrusions. Over 1 million WordPress sites were cracked last year, largely due to preventable security gaps. Have yourself prepared and you are likely to be on the safe side.