Possible Clues:

• In need of a break -- hard rocker, newwaver
• Determined soldier, for example, behind a barrier
• Insistent, resolute
• A little taken aback, interrupted by chap refusing to back down?
• A chap employed by a newspaper firm
• Firm in one's position
• Determined a soldier should get round blockage
• Inflexible: fabulously hard rock
• Very hard old rocker
• Rigid section of road a man treated