Conditional WP_query with Meta_query

I am trying to create a loop where posts are displayed from autor 1, or if the post contains metavalue in the field metakey.

I came up with below code, but I cant get it to work

$args = array( relation' => 'OR',
    array ('author' => 1 ),
    array ('meta_query' =>
      array(
        'key' => 'metakey',
	'value' => 'metavalue',
           )
          )
  );

Also in case it works, will it show twice if match both author 1 AND the metavalue in metakey?