Hello,I found a lot of posts about css override,but still need to ask. Have this problem.In my wordpress theme links,buttons,p,div,... elements are defined,but I need to in my div box override all previous defined values,just to clear it.How can I do that,here is the structure of my div box

<div class="nBox">
    <div id="skr" class="newsBox scrollable">
        <div class="items">

        <div class="this-one">

         I here load programmaticly text from Tinymce editor,
         with tags and his own defined styles and values.

        </div>

Is there a way to clear previous defined style,so in my div.this-one everythings works fine.