Displaying Product Description In A Product Scroller

I've got a product scroller showcase block on the homepage, currently listing the featured products (Responsive theme). I've been adding extra fields to the product card such as the sku, quantity, amount, etc. I want to do the same witht the product description, however I couldn't find a way to do so. I've tried everything. In the inspected HTML it shows the product description div, but it is empty.

I've got

"show_descr=true"

and also tried to pull it in with

{assign var="prod_descr" value="prod_descr_`$obj_id`"}{$smarty.capture.$prod_descr nofilter}

including other solutions I've found on the forum, but no luck.

Has anybody got an idea of what could be/could I be doing wrong?

Thank you so much!