Snake-haired monster (6)

I believe the answer is:

medusa

(Other definitions for medusa that I've seen before include "One of three sisters with snakes for hair" , "Mythical woman with snakes for hair" , "Gorgon slain by Perseus" , "Amused (anag)" , "all her visitors got stoned" .)

I've seen this clue in the Sydney Morning Herald.

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