18d Harmful substance in the environment (8) . . . I have N?O?O?I? and can only fit Neologic, but the definition doesn't fit clue ! Would appreciate help ;0)
Thanks crofter and ulysses . . it must be Neotoxin as N is without doubt the first letter. However, I am unable to find the word (even in Chambers). Can I ask where you found this please ulysses?