Old guard fret about young miscreant (6,6)
I believe the answer is:
artful dodger
'young miscreant' is the definition.
I know that 'young' relates to this answer.
'old guard fret about' is the wordplay.
'about' is an anagram indicator.
'old'+'guard'+'fret'='oldguardfret'
'oldguardfret' with letters rearranged gives 'ARTFUL DODGER'.
Can you help me to learn more?
(Other definitions for artful dodger that I've seen before include "Young criminal" , "Character in Oliver Twist" , "One of Fagin's gang (Oliver Twist)" , "young offender" , "novel thief - with 4a" .)