### Clue: JFK or Nixon could be seen as a product of the Masons? (9)
### Answer: STONEWORK 
 ### Explanation: Definition: product of the Masons
 STONE(Oliver, controversial American film director) + WORK(a product/one's output, an example of which, in Stone's case are the films, JFK or Nixon).
Defn: …, or "masons"/craftsmen working with stone.