### Clue: Lyttelton's dissatisfied exclamation? (5)
### Answer: HUMPH 
 ### Explanation: Definition: Lyttelton,dissatisfied exclamation
  Double defn:  1st:  Nickname for HUMPHrey *Lyttlelton* (1921-2008), jazz musician (trumpet and clarinet), singer, writer, broadcaster.  I liked his BBC Radio 2's Best of Jazz, and BBC Radio 4's I'm Sorry I Haven't A Clue.