Related Clues:

• Amazon muscle relaxant: Var.
• If it's poison, the brute may need a mixture of air with it
• Poison the brute with a mixture of air
• How poisonous for the brute to get the mixture of air
• The brute is deadly on the air
• The poor brute makes a mixture of air so poisonous
• 27 across is over the poisonous air
• At first the last of 30 across needs the mixture of air to be poisonous
• The brute makes the air poisonous