Crossword Genius

Toxic substance (6)

Ross

I believe the answer is:

poison

'toxic substance' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for poison that I've seen before include "Toxic substance" , "Eg, toxin" , "Venom, toxin" , "Venom, harmful substance" , "[ADDER] 's defence" .)

I've seen this clue in the Newsday and The Mirror.
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