Dear Mark,
You might be able to do this using a custom shortcode, add these lines to functions.php in your theme:
add_shortcode('cred_order_field', 'cred_order_field_func');
function cred_order_field_func($atts) {
$title = do_shortcode("[wpv-post-title]");
$slug = do_shortcode("[wpv-taxonomy-slug]");
$out = '[cred_field field="order-' . $slug . '" post="orders" value="' . $title . '"]';
return do_shortcode($out);
}
Then you can use [cred_order_field] in your template.
Please let me know if you are satisfied with my answer and if I can help you with any other questions you might have.
Regards,
Caridad