### Clue: At St Paul's ultimate activist is unravelling government figures (5,10)
### Answer: VITAL STATISTICS 
 ### Explanation: Definition: government figures
  **Anagram of**(unravelling) [AT ST + L(the last letter,ultimate of "Paul") + ACTIVIST IS]
Defn:  Figures relating to the human population and its condition and maintenance, eg. births, deaths, marriages, unemployment, age distribution, etc. tallied by the government.  Not exactly what springs to mind when one hears the phrase in common usage.