WordPress cloning, as it applies to fix wordpress malware plugin, is the act of making an exact copy of your WordPress install. What's great is that with the correct software, you can do it. There are a lot of reasons. Here are just a few.
Backup plug-ins is useful content also important. You need to backup database and all the files you can bring back your blog like nothing happened.
Yes, you need to do regular backups of try this out your website. I recommend at least a weekly database backup and a monthly "full" backup. More, if at all possible. Definitely more if you make regular additions and changes to your site. If you have a community of people that are in there all the time, or make changes multiple times every day, a daily backup should be a minimum.
Note that you should only try this last step for setups. If you would like to do it you'll also need to useful reference change of the table names inside the database.
These are a few. Great thing is that they don't require much time to do. These are also easy options, which can be done easily.