Related Clues:

• Completely determined
• Refusing to change one's mind
• 'Solid, unyielding (4)'
• There's a big din still there
• Not going to make an offer in this - Gee!
• Here there are gents by the thousand for company
• One might, to be sure, claim that this was the insect of 3 down
• Not going to be such a big din.
• Can one be so sure that this was the father of all insects?
• Can one be so positive that that's an insect mother?
• How the tree gets grand & Co
• The business is well-established
• One may be positive that that was the very first insect
• One may be positive that this was the first of all the insects
• How a 18 down may may positively get to be six feet long