Related Clues:

• One may be positive that this is the first of the insects
• One may be positive that that's the father of all the insects
• Very hard for first male worker
• Girl meets chap and starts talking - but doesn't yield
• Note chap in reserves returning determined
• The first male worker in firm
• Legendary rock singer of the 1980s
• Very hard man starting things off, a little worker?
• First person supported by a conservation group is determined
• First person overseeing worker is determined
• These days a French lover is very hard
• Very hard computer programming language? Prayer is of no use!
• Firmly unchanging
• Unshakable (in an opinion)
• Inexorable