This worked for me.
Put this in your functions file:
<?php
function example_sc( $atts ){
ob_start();
get_template_part('template','part');
return ob_get_clean();
}
add_shortcode( 'example', 'example_sc' );
?>
Put this in your template file:
<?php
if(get_sub_field('wysiwig')):
$wysiwig = do_shortcode(get_sub_field('wysiwig',false, false));
else:
$wysiwig = '';
endif;
?>
<?php echo $wysiwig; ?>