Related Clues:
- Stare at Johnny before kiss
- Masseur’s set of matches?
- Bessemer process output
- Something categorized by carbon content
- Tempered literary symbol in 16-Across
- Elastic substance
- Avenger almost left, showing staying power
- Rob told it's very tough in construction
- Superman's metal
- Alloy containing iron
- Hard iron alloy
- Series of games for masseur
- Ball material, often
- Product Pittsburgh is famous for
- Cutlery composition