Crossword Genius

Child who serves as an acolyte (5,3)

Ross

I believe the answer is:

altar boy

(Other definitions for altar boy that I've seen before include "Young singer" , "Priest's attendant" , "Priest's young assistant during a service" , "Youth who assists priest at mass" .)

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.