### Clue: Journalism in the Guardian, but not in Times or Sun? (7,7)
### Answer: LEADING ARTICLE 
 ### Explanation: Definition: Journalism
 What one could call "A", alphabetically the first/leading article in grammar; and which is found in the spelling of "Guardian" but not in "Times" or "Sun".
Defn: A piece of … which gives the editor's opinion on an important news item.