Possible Clues:

• Eg, rust (S, not Z)
• Put protective cover on steer I had oddly in shed
• New side, after old team get rusty
• Old football team from Dublin loses the lead to sharp-type - this is what it means to go rusty
• Eg, go rusty
• Combine chemically with a particular gas — ie six do (anag)
• A chemical way to make one bovine, perhaps (7)
• Rust
• The beast I had started to rust