Related Clues:

• They are by way of a poisonous afterthought
• By way of afterthought, they're biting
• By way of a biting afterthought
• Biting afterthoughts, like
• Like a poisonous afterthought
• Does their poison come at the end of the letter, like?
• Like what comes at the end, but not with a sting in the tail
• Poisonous, by way of an afterthought
• Like a biting bit at the bottom
• 10 across poisonous end to a letter?
• Like to come at the end? Bound to be fatal
• Like this it comes at the end, but the sting is not in the tail of them
• 23 downs, by way of an afterthought
• Like a bit at the end to be so biting?
• Deadly at the end of the letter, like