Crossword Genius

__ Rica (5)

Ross

I believe the answer is:

costa

(Other definitions for costa that I've seen before include "and 5 Down: Spanish holiday destination" , "Rib or rib-like structure" , "Rib (Botany, Zoology)" , "A Spanish coast, may be Del Sol" , "__ Brava, region of northeast Spain" .)

I've seen this clue in the Universal, the Penny Press, the King Feature Syndicate, The Washington Post, the LA Times and The New York Times.
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