customer_cat
$tax_query = array( 'relation' => 'OR', array( 'taxonomy' => 'customer_category', 'terms' => 'customer-story', 'field' => 'slug', ), );
$tax_query = array( 'relation' => 'OR', array( 'taxonomy' => 'customer_category', 'terms' => 'customer-story', 'field' => 'slug', ), );