WordPress、カスタム投稿をタクソノミーのslugで絞るWP_Query

$args = array(
'post_type' => 'event',
'orderby' => 'meta_value_num',
'order' => 'DESC',
'meta_key' => 'event-start-date',
'tax_query' => array(
array(
'taxonomy' => 'tx-event',
'field' => 'slug',
'terms' => 'slugnamexxxxx',
)
),
'paged' => $paged);