Hiding prices on 1 category

This is a css question, and I am stuck.

I want to hide the prices on one category page, I cannot figure out the selector for a product category, there isn’t a page/post id to work with. Any help would be greatly appreciated, thanks.

Here’s the selector I have so far but that kills ALL prices everywhere.

.woocommerce ul.products li.product .price {
display: none; }