How to display node teaser in Display Suite custom field?
I did this by adding a preprocess field which then becomes available in DS.

&lt;?php
      function MYTHEME_preprocess_node(&amp;$variables) {
        // Get the summary as a discrete field.
        $body = array_pop(field_get_items('node', $variables['node'], 'body'));
        $variables['node_summary'] = $body['safe_summary'];
      }


Then in display suite add a preprocess field named node_summary.