Mexico's ___ Conchos

RIO

This major waterway shares its name with a Spanish word for "river."

This clue refers to the Río Conchos, a major river in northern Mexico that flows into the Río Grande. The blank hints at the Spanish word for "river," which is "río," making the answer straightforward once you recognize the geographical name. It’s a direct fill-in without wordplay—just a test of knowing Mexico’s rivers or Spanish vocabulary.