### Clue: A power-hungry king hesitated to rewrite Sondheim musical (6,2,3,4,4,6)
### Answer: SUNDAY IN THE PARK WITH GEORGE 
 ### Explanation: Definition: Sondheim musical
  **Anagram of**(to rewrite) A POWER-HUNGRY KING HESITATED. 
Answer: A Stephen Sondheim (a cryptic crossword buff himself) musical.  A clever anagram, but awkward to provide a definition to.  Without the writer's name, it would have been too difficult, but with it, the choices are drastically reduced, making it that much easier.