Very dangerous poison (7)
I believe the answer is:
cyanide
(Other definitions for cyanide that I've seen before include "Poisonous compound" , "Toxic salt" , "Nice day (anag) - poison" , "Highly toxic substance" , "Extremely poisonous salt" .)
I believe the answer is:
cyanide
(Other definitions for cyanide that I've seen before include "Poisonous compound" , "Toxic salt" , "Nice day (anag) - poison" , "Highly toxic substance" , "Extremely poisonous salt" .)