Answer: EBRO

AnswerCrossword Clue
EBROLongest river fully inside Spain
EBRORiver of Aragon
EBRORiver from the Cantabrian Mountains
EBROThe Aragon flows into it
EBROSpanish river to the Mediterranean
EBRORiver originating in Cantabria
EBROThe Aragón is a tributary of it
EBROSpanish Civil War battle site
EBROLongest river entirely within Spain
EBRODrain for the rain in Spain
EBROSpain's "Nile"
EBROHistoric Spanish river
EBROHistoric river of Spain
EBRORiver near Barcelona
EBRORain in Spain collector?
EBRORiver through Aragón
EBRO470-mile Spanish river
EBROLongest Spanish river
EBROSpain's most voluminous river
EBROLong river of Spain
EBROAragon River's outlet
EBROLong river in Spain
EBRORiver of Spain
EBROSaragossa's river
EBROIberian river
EBROSpanish river
EBRORiver through Aragon
EBROLongest river entirely in Spain
EBRORiver in Iberia
EBROLongest wholly Spanish river
EBRORiver of Aragón
EBRORiver to the Mediterranean
EBRORiver through Spain
EBROBig river in Spain
EBROZaragoza's river
EBROSpain's longest river
EBROIts source is in the Cantabrian Mountains
EBRORiver running through Zaragoza
EBROSpain's second-longest river
EBRORiver flowing through Zaragoza