I am trying to display a list of classifieds of a certain tag.
It appears that there is no short code system for this at the moment.
This is a specific request and not a general request like this: https://premium.wpmudev.org/forums/topic/global-classifieds-shortcode
As it is just a wordpress custom taxonomy and post type I imagine that the following would work:
wp_query = new WP_Query("post_type=classifieds&classifieds_tags=this-is-the-classifieds-tag&post_status=publish&posts_per_page=10");