Crossword Genius

Cobra comment (4)

Ross

I believe the answer is:

hiss

(Other definitions for hiss that I've seen before include "Sharp sibilant sound" , "Boo" , "Sibilant sound made through the teeth" , "Make disapproving sound" , "Snake noise" .)

I've seen this clue in the Newsday.com and the Penny Press.
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