Related Clues:

• The first male worker was most insistent
• Faith shown by worker in firm
• A cause of current stoppage? Worker, perhaps, being inflexible
• Very hard old rocker
• Rigid section of road a man treated
• Girl meets chap, starts talking, but is unyielding
• Worker supporting first man to get tough
• Resolute, a worker crossing barrier
• Pop star refusing to dance to someone else's tune?
• Unshakeable
• Stubborn Old Testament character has a New Testament following
• Pursued by servant, Byron's daughter -- tense and unyielding
• Firm's first male worker
• A staunch worker refusing to be persuaded
• Insistent man is superior to insect