Possible Clues:

• Joiner from another union posted engaging uplifting discussion with love
• Newcomer to family set out for upper area of plain
• New dad's endless anxious state: obvious no head's visible
• D-darling's upset over a rift - result of remarriage?
• Relative set out plain, though not originally
• Mike Brady, for one
• Pater's new woman? Pater spent freely!
• Cinderella's nemesis, e.g.
• One raising strange issue of test paper being abandoned about middle of examination
• Proceeding with different partner contracted as relative