Related Clues:

• Rust is iron -
• Compound decrease - lower most of aim
• Eg, rust
• Anger about old TV bobby turning up evidence of degradation?
• I might appear on old bike I travel round on and steer
• Compound I travel round on farm animal
• Rusting agent
• Zinc __: sunblock ingredient
• Cockney's leather or water, say
• O, as in ZnO
• Anger about formerly screened copper ring, over rust
• Papers found on the farm in the beginning beside Oriental rusty compound for one
• Lime, e.g
• It's essential to sienna
• Quicklime, for one