Crossword Genius

Hades' river of forgetfulness (5)

Ross

I believe the answer is:

lethe

'hades' river of forgetfulness' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for lethe that I've seen before include "Oblivion; river of the underworld" , "Ethel's mythical river of forgetfulness" , "River whose waters caused the souls of the dead to forget completely their life on Earth" , "Mythological river in Hades" , "where elephants never drink?" .)

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