### Clue: Call a Brontë sister, secretly (4)
### Answer: BELL 
 ### Explanation: Definition: Call,a Brontë sister, secretly
 Double defn: 1st: Informally, to call on the telephone; and 2nd: The surname of the pseudonyms used by each of the literary Brontë sisters, ie. someone who was secretly a Brontë sister.