WordPress query taxonomy by meta key and value

gistfile1.aw

<?php 
	$myquery = array(
		'tax_query' => array(
			array(
				'taxonomy' => 'productcat',
				'terms' => array('equip', 'pro-rack', 'slat-tech', 'acrylics' , 'i60-system' , 'prestige', 'shop-x', 'shopfitters'),
				'field' => 'slug'
			)
		),
		'order' => 'ASC',
		'meta_key' => 'feature-on-homepage',
		'meta_value' => 'Yes'
	);
	$showFeaturedProduct = new WP_Query( $myquery );
?>

<?php 
	while ($showFeaturedProduct->have_posts()) : $showFeaturedProduct->the_post(); 
?>

<div class="one_third">
	<?php if ((has_post_thumbnail()) ) { ?>
		<a href="<?php the_permalink() ?>"><?php the_post_thumbnail('front-post-thumbnail'); ?></a>
	<?php } ?>
	<h2><a href="<?php the_permalink() ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
	<?php the_excerpt(); ?>
</div> 
	
<?php endwhile; ?>
<?php wp_reset_query(); ?>