Possible Clues:

• Labour minister, who once attacked political correctness, claims most of others exaggerated
• US historian’s description of Amundsen’s arrival at Pole?
• City northwest of Tucson
• John —, politician
• John _; Labour politician
• MP with somewhere to sleep in the city when not working
• Powerful politician before (say) Brown's time
• Vacillating protects political hard-hitter
• John is before Walter