Crossword Genius

Petrichor, n.: The pleasant ___ of rainfall on dry soil (5)

Ross

I believe the answer is:

aroma

(Other definitions for aroma that I've seen before include "Nose" , "Test of knowledge" , "Spicy fragrance" , "Agreeable odour" , "Savour" .)

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