Crossword Genius

Treacherous types: racers, perhaps (6)

Ross

I believe the answer is:

snakes

I believe this is a double definition.

'treacherous types' is the first definition.
(snake can mean a treacherous person)

'racers perhaps' is the second definition.
(racer is a type of snake)

(Other definitions for snakes that I've seen before include "Adders, cobras, rattlers etc" , "Winds; adders" , "[CREES]" , "Go down them on board" , "Eg, cottonmouths, boas" .)

I've seen this clue in The Guardian.
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