acf post object
<?php
// DISPLAY CONTENT FOR SINGLE POST OBJECT
$post_object = get_field('post_object');
if( $post_object ):
// override $post
$post = $post_object;
setup_postdata( $post );
?>
<div>
<h3><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h3>
<span>Post Object Custom Field: <?php the_field('field_name'); ?></span>
</div>
<?php wp_reset_postdata(); // IMPORTANT - reset the $post object so the rest of the page works correctly ?>
<?php endif; ?>