Get the taxonomy term field in Views 3 override title
I was able to solve a very similar issue in which I needed to override the view title with a field from the first result.

I used hook_views_pre_render() to accomplish this in drupal 7.

function tag_views_pre_render(&amp;$view) {
  if( $view-&gt;name == 'flex' ){
    if ( count($view-&gt;result) ){
      $view-&gt;build_info['title'] = $view-&gt;result[0]-&gt;node_title;
    }
  }
}