Possible Clues:

• “Bonanza” setting
• Attempt abandoned by a Northants town? American place goes the other way
• A man turned on head of nanny state
• Neighbor of 23-Down
• Where Area 51 is located
• Chap retired in an American state
• Duck without tail in an upset state
• Where boy is brought up in North America - the Sagebrush State
• Dean arranged to take Virginia in a state
• See 14