Church taking edge off unruly youngster (5)
I believe the answer is:
child
'youngster' is the definition.
(a youngster is a child or young person)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for child that I've seen before include "Not an adult" , "Kid" , "Minor" , "Juvenile" , "Young human" .)