Related Clues:
- Protection for construction workers in Derby, perhaps
- Protective helmet
- Builder's safety wear
- Safety headgear
- Reactionary bowler, perhaps
- Building-site topper
- Construction site headgear
- French helmet
- Foreman's topper
- Riveter's protector
- Difficult to deal with that topless 'nutcase'
- Construction worker's helmet
- Bony protuberance in hornbill caught like that in Paris
- What covers a dome in construction?
- Workplace head protection