Related Clues:

• Like the poisonous bit at the end
• The sort of pass that may make one pass away
• Poisonous enough for a hundred and fifty of them to have got a grip on you
• Poisonous as afterthoughts
• They bite like the bit at the end
• The way it comes right at the end could be the death of you
• May be the death of you, like it comes as the end
• One may have got to grips with a hundred and fifty such fatal things
• Highly dangerous, by the way of an afterthought
• However poisonous, after a century and a half one gets to grips with them
• Poisonously like the start of 19 across
• You may pass them; they're not going on foot
• Something in the way of an afterthought has them footless
• They may be the death of you by the way of afterthought
• They might pass and make you pass away