WordPress at a glance
action is not described

clean_site_cache action-hook . WP 4.6.0

Fires immediately after a site has been removed from the object cache.

Usage

add_action( 'clean_site_cache', 'action_function_name_5854', 10, 3 );
function action_function_name_5854( $id, $blog, $domain_path_key ){
	// action...
}
$id(int)
Blog ID.
$blog(WP_Site)
Site object.
$domain_path_key(string)
md5 hash of domain and path.

Where the hook is called

clean_blog_cache()
wp-includes/ms-blogs.php 474
do_action( 'clean_site_cache', $blog_id, $blog, $domain_path_key );

Where the hook is used (in WP core)

Does not used.