WordPress at a glance
action is not described

clear_auth_cookie action-hook . WP 2.7.0

Fires just before the authentication cookies are cleared.

Usage

add_action( 'clear_auth_cookie', 'action_function_name_4547' );
function action_function_name_4547(){
	// action...
}

Where the hook is called

wp_clear_auth_cookie()
clear_auth_cookie
wp-includes/pluggable.php 940
do_action( 'clear_auth_cookie' );

Where the hook is used (in WP core)

Does not used.