Add short description after Mix and Match product title

functions.php

/* 
 * Add product descriptions after product title
 * fair warning: longer descriptions will be very cramped, this is just an example
 * @param obj $mnm_product: the mix and matched product
 * @param obk $product, the parent/container product
 */
function kia_add_descriptions_to_mnm( $mnm_product, $product ){
	$short_description = $mnm_product->post->post_excerpt;

	if ( ! $short_description ) {
		return;
	}

	?>
	<div itemprop="description">
		<?php echo apply_filters( 'woocommerce_short_description', $short_description ) ?>
	</div>
<?php
}
add_action( 'woocommerce_mnm_row_item_description', 'kia_add_descriptions_to_mnm', 30, 2 );