Since installing GeoDirectory I have become aware of two meta description fields in my header. I deactivated the plugin and it disappears so its definitely the cause. The other meta description is being generated by Yoast SEO plugin and this is the one I want to use.

Can you tell me in which GeoDirectory plugin file I can comment out the code that generates the extra meta description?

Plz put these lines of code in ur child theme functions.php file.

add_action('init' , 'geodir_remove_meta_tags');
function geodir_remove_meta_tags()
{
	remove_filter('wp_head' , 'geodir_add_meta_keywords') ;
}