Related Clues:

• Sounds as if one knows where to find such a partition
• The raised end of 11 across
• Would it rise after the cart for firing?
• If a cart goes over this rise it may go off
• A cart might go over it and go off
• In sum, the pet is confused between passages
• It's raised and fired after 30 across (5)
• One will rise to go off after the cart
• A cart might go off over such a hump
• It would be raised behind the cart and then would go off (5)
• If a cart were to go over anything so high it might go off
• Each one of 20 down has one for a month to start with
• If a cart gets over this it may go off
• The cart before the rise may make it go off
• In sum, there's a crooked pet in the nose