How to Display Posts From Category Within a Custom Taxonomy?

@Krzysiek answer above didn’t work because have_posts is a method not a property. It should be have_posts() not have_posts. Here’s the corrected code:

$my_query = new WP_Query( array(
    'post_type'=>'news',
    'posts_per_page'=>4,
    'tax_query'=>array(
        array(
            'taxonomy'=>'instituteName',
            'field'=>'slug',
            'terms'=>'businessschool'  // change to real slug
        )
     )
) );

while ( $my_query->have_posts() ) {
    $my_query->the_post();
    // display post
}