### Clue: Priest getting A-lister's hissyfit (9)
### Answer: CELEBRANT 
 ### Explanation: Definition: Priest
  CELEB(short for "celebrity";a VIP;one who's on the A-list) + RANT(loud and angry speech;a hissyfit – shouldn't the latter be two words?). 
Answer:  One who officiates at a religious ceremony, usually a priest.