Crossword Genius

Like holographic Pokémon cards (4)

Ross

I believe the answer is:

rare

(Other definitions for rare that I've seen before include "Seldom - unusual" , "like gold dust" , "Singular, infrequent" , "Scarce as hen's teeth!" , "Very scarce and probably valuable" .)

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