If you like to create a blank new WordPress default website without bringing anything from the existing site, this article is for you.
Read here how to reset the WordPress database back to its defaults and how to delete all customizations and content from the database.
To do that, just create a new WordPress clone site as you would do usually by using WP Staging. Then install and activate the plugin WordPress Reset on the new staging site.
This plugin allows to resets the WordPress database back to its default values.