Answer: nervegas

AnswerCrossword Clue
NERVEGASWeapon outlawed by a 1993 agreement
NERVEGASChemical warfare weapon
NERVEGASOutlawed weapon
NERVEGASRespiration retarder
NERVEGASVX, e.g.
NERVEGASBanned weapon of war
NERVEGASSarin, for one