title: WooCommerce: Showing Descriptions for Active Attribute
body: <p>WooCommerce lets you write an attribute description, but it doesn't display anywhere. </p>
  
  <p>I was wanting to display this attribute description on the category page, but only for one type of attribute, when it is selected (pa_color).</p>
  
  <p>Solution below. Hopefully saves you some time!</p>