A good boy it's possible to scorn? (5)
I believe the answer is:
scout
'to scorn?' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for scout that I've seen before include "Member of a youth movement" , "One searches for and recruits talented people" , "One making recce" , "Explore" , "Explorer, spy" .)