### Clue: Celebrants raucously jeer choirs lacking a bit of holiness (9)
### Answer: REJOICERS 
 ### Explanation: Definition: Celebrants 
 **Anagram of**(raucously) "jeer choirs " **minus the 1st letter of**(lacking a bit of) "holiness ".
Quote:  "Just rejoice at that news and congratulate our forces and the marines. .. Rejoice." during the Falklands War.