Hello,
Do you want that the users click on the filter name the area which you marked with yellow lines and then the below filter box shown which is marked by red lines and otherwise the area remain hidden?
To change the font size and color of Clear Filter word. You can use the below CSS code in global custom CSS area under theme settings >> custom CSS.
.wd-cross-button.wd-size-s.wd-with-text-right{
padding-left: 16px;
font-size: 29px;
color:red;
}
Best Regards.
.
