Add referencing entities into this entities renderable array
Seems custom code was the easiest thing here after a bit of research...

function HOOK_taxonomy_term_view_alter(&amp;$build) {
    if($build['#term']-&gt;vocabulary_machine_name=='bands') {
        $units = load_bands_members($build['#term']-&gt;tid);
        $build['units'] = array(
            '#markup' =&gt; theme('bands_members', array('members' =&gt; $members))
        );

    }
}


The function load_band_members returns an array of taxonomy terms and looks like this:

function load_band_members($tid) {
    $tids = db_query("SELECT tid
        FROM taxonomy_term_data td
        INNER JOIN field_data_field_band b ON b.entity_id = td.tid
        WHERE td.vid = 6 AND b.field_band_tid = :tid", array(':tid'=&gt;$tid))-&gt;fetchCol();
    return $tids ? taxonomy_term_load_multiple($tids) : false;
}


I'm sure it would somehow be possible to get Drupal to render my band members for me, like it does on their own taxonomy term page, as opposed to me having to call my own custom render function but that will do for now...