WP_Query sort by custom filed

Hi guys,

I want to retrieve the posts into the loop and arrange / filter them by priority. I want the posts marked ‘featured’ to have a higher priority while the rest of the posts can come right below that. I am using the following code.

$loop = new WP_Query( array(
	'post_type' => 'company_listing',
	'cat' => get_query_var('cat'),
	//'meta_key' => 'featured',
	//'orderby' => 'yes'
	)
);

When ever I comment out the meta_key and the orderby (which is a radio button) it only returns the featured posts and none of the ordinary posts. I also do not wish to return redundadt posts