Crossword Genius

Spain's longest river (4)

Ross

I believe the answer is:

ebro

'spain's longest river' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for ebro that I've seen before include "European runner" , "River of NE Spain; bore (anag.)" , "Spanish runner" , "Border Hannibal crossed" , "flower" .)

I've seen this clue in The New York Times.
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