Crossword Genius

Olfactory stimulus

Ross

I believe the answer is:

odor

'olfactory stimulus' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for odor that I've seen before include "Pong in Ohio" , "Stink in US" .)

I've seen this clue in The Wall Street Journal and the LA Times.
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