Poisonous (5)
'poisonous' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for noxious that I've seen before include "Unwholesome" , "Harmful to health" , "Unpleasant and harmful" , "Disgusting" , "Pernicious" .)
'poisonous' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for toxic that I've seen before include "Deadly - venomous" , "Poisonous, noxious" , "Harmful - cox it (anag)" , "word describing bad things" .)
'poisonous' is the definition.
(I know that poisonous can be written as venomous)
This is the entire clue.
(Other definitions for venomous that I've seen before include "Poisonous like many snakes" , "Full of poison" , "acid" , "Very malicious or spiteful" , "(Of snake) injecting poison" .)