//Ajax load more posts
add_action( 'wp_ajax_load_more', 'load_more_callback' );
add_action( 'wp_ajax_nopriv_load_more', 'load_more_callback' );

function load_more_callback() {
	$news = new WP_Query( array(
		'post_type'      => 'clients_cpt',
		'order'          => 'DESC',
		'orderby'        => 'date',
		'posts_per_page' => $_POST['perpage'],
		'offset'         => $_POST['offset']
	) );
	if ( $news->have_posts() ) {
		while ( $news->have_posts() ) {
			$news->the_post();
			show_template( 'clients-item', null, 'template-parts/cpt' );
		}
	}
	wp_die();
}