Display clone fields inside a relationship loop

Hi,

I'm stuck, can't seem to figure out how to display clonefields in a relationship loop

{% set gargs = {post_type: 'grille', nopaging: true, relationship: {id: 'radiator-grille', from: post.ID} } %}
{% set grilles = mb.get_posts( gargs ) %}			
{% for grille in grilles %}
			<li class="jaga-card col-6 col-md-3 col-lg-2">
				<a href="{{mb.the_permalink(grille.ID)}}">
					{% if   mb.get_the_post_thumbnail( grille.ID, 'thumbnail') %}    
					{{ mb.get_the_post_thumbnail( grille.ID, 'thumbnail') }}     
					{% else %}
					<img src="placeholder-150x150.png" />
					{% endif %}
					<h4>{{ grille.post_title }}</h4>
					{% for clone in post.group_fwdwryesb7q %}
						{{ clone.text_sppju67l5ln }}
						<img src="{{ clone.single_image_83x8utmqg6l.thumbnail.url }}" width="{{ clone.single_image_83x8utmqg6l.thumbnail.width }}" height="{{ clone.single_image_83x8utmqg6l.thumbnail.height }}" alt="{{ clone.single_image_83x8utmqg6l.thumbnail.alt }}">
					{% endfor %}
				</a>
			</li>
			{% endfor %}

How do I get the clone fields to display?

A little example would be great.

Thanks in advance.

Br,
Chris