### Clue: Man liberates your leaders gradually (6)
### Answer: GENTLY 
 ### Explanation: Definition: gradually
  GENT(gentleman,man) [L + Y](initial letters,leaders of "liberates your")
Answer:  Also, Dirk, main character in Douglas (THHGTTG) Adams' Dirk Gently's "Holistic Detective Agency", a "thumping good detective-ghost-horror-who dunnit-time travel-romantic-musical-comedy-epic", as described by the author.