470-mile Spanish river, 4 letters
Battle of the ___ (Spanish Civil War event), 4 letters
Battle of the ___, in the Spanish Civil War, 4 letters
Battle site of 1938, 4 letters
Collector of the rain in Spain, 4 letters
Complex by Rome in early stage of development (6), 4 letters
Drain for the rain in Spain, 4 letters
Historic river of Spain, 4 letters
Historic Spanish river, 4 letters
Iberian Peninsula river, 4 letters
Iberian Peninsula's 2nd-longest river, 4 letters
It begins in the Cantabrian Mountains, 4 letters
It empties into the Mediterranean, 4 letters
It goes by Saragossa, 4 letters
It rises in the Cantabrian Mountains, 4 letters
It stretches halfway across Iberia, 4 letters
Its source is in the Cantabrian Mountains, 4 letters
Largest banks in Spain, as it were, 4 letters
Long river in Spain, 4 letters
Longest river entirely in Spain, 4 letters
Longest river entirely within Spain, 4 letters
Longest river fully inside Spain, 4 letters
Longest river in Spain, 4 letters
Longest river wholly in Spain, 4 letters
Longest Spanish river, 4 letters
Longest wholly Spanish river, 4 letters
Major river of Spain, 4 letters
Major Spanish river, 4 letters
Miranda de ___, Spain, 4 letters
Rain in Spain collector, 4 letters
River flowing through Zaragoza, 4 letters
River from the Cantabrian Mountains, 4 letters
River near Barcelona, 4 letters
River of northeast Spain, 4 letters
River of northern Spain, 4 letters
River of Spain collector, 4 letters
River originating in Cantabria, 4 letters
River rising in the Cantabrian Mountains, 4 letters
River running through Zaragoza, 4 letters
River that ends in Tarragona, 4 letters
River that gives Iberia its name, 4 letters
River that named Iberia, 4 letters
River that rises in Cantabria, 4 letters
River that was the ancient dividing line between Rome and Carthage, 4 letters
River through Castile and Le, 4 letters
River through Catalonia, 4 letters
River through La Rioja, 4 letters
River through Logro, 4 letters
River through Spain, 4 letters
River through Tortosa, 4 letters
River through Zaragoza, 4 letters
River to the Mediterranean, 4 letters
River whose delta is Cape Tortosa, 4 letters
Sources of hydroelectric power in Spain, 4 letters
Spain's longest river, 4 letters
Spain's most voluminous river, 4 letters
Spain's second-longest river, 4 letters
Spanish river that empties into the Mediterranean Sea at Riumar, 4 letters
Spanish river that sounds like a greeting, 4 letters
Spanish river to the Mediterranean, 4 letters
The Aragon flows into it, 4 letters
The longest river entirely within Spain, 4 letters
The Segre feeds into it, 4 letters