Crossword Genius

Serpent's sound (4)

Ross

I believe the answer is:

hiss

'serpent's sound' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for hiss that I've seen before include "Sound of serpent" , "Urgent whisper" , "Wordless sound of disapproval" , "less welcome sign?" , "Make sibilant sound like snake" .)

I've seen this clue in The Star Tribune and the Penny Press.
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