Crossword Genius

Adder (5)

Ross

I believe the answer is:

viper

'adder' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for viper that I've seen before include "poisonous type" , "Malicious person" , "Adder" , "Malicious type" , "A poisonous snake or treacherous person" .)

I've seen this clue in The Mirror, The Independent, the Evening Standard and The Telegraph.
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