ECP custom fields

<tr>
<td class="tribe-events-event-meta-desc"><?php _e('Duration:', 'tribe-events-calendar') ?></td>
<td class="tribe-events-event-meta-value" itemprop="endDate"><?php echo tribe_the_custom_fields('Duration'); ?></td>
</tr>

This is what is returned:

<tr>
<td class="tribe-events-event-meta-desc">Duration:</td>
<td itemprop="endDate" class="tribe-events-event-meta-value"><dl class="column">
<dt>Duration:</dt><dd>90 minutes</dd>
</dl>
</td>
</tr>