Related Clues:

• Nitrous ___
• Iron ___ (rust)
• Rust, for instance
• Nitrous --
• Ferric ___ (rust component)
• Ferric ___ (rust)
• Cuprite or zincite
• Rust, e.g
• Corundum, for one
• Rust compound
• Compound of oxygen and one other element
• Sounds like an 11 down way to be seeing that it gets rusty
• Rust, for instance, has a beastly look, by the sound of it
• Salt for the poem around eleven
• There's eleven in the ode for salt