Here’s the code from functions.php
add_action( 'pre_get_posts', 'vendor_sort' );
function vendor_sort( WP_Query $wp_query ) {
// Ensure it is the global $wp_query
if ( ! $wp_query->is_main_query() )
return;
if ( $wp_query->is_tax( 'vendor-type' ) ) {
$wp_query->set( 'meta_key', 'crfp-average-rating' );
$wp_query->set( 'orderby', 'meta_value_num' );
$wp_query->set( 'meta_compare', '>' );
$wp_query->set( 'order', 'DESC' );
}
}