Possible Clues:

• Back of the head
• The back of the head
• Back of the skull
• Back of skull
• On top of my head is where I place this at last
• Back of head
• Odd topic cut short at the back of one's brain
• To bovine animal, say, I attribute part of skull
• That's the firm turn to the century I place for 1 across
• The head's back, wanting old carbon copies I set