South American tuber

OCA

This Andean root vegetable is often compared to a small, colorful potato.

"South American tuber" points to oca, a starchy root vegetable grown in the Andes for centuries. It’s often compared to potatoes but has a slightly tangy flavor and comes in bright colors like red or yellow. The clue is straightforward—no wordplay—just a direct reference to this lesser-known crop, sometimes called "New Zealand yam" outside its native region.