Side with boy, oddly, and step out of line (7)
I believe the answer is:
disobey
'and step out of line' is the definition.
I can't judge whether this defines the answer.
'side with boy oddly' is the wordplay.
'with' is a charade indicator (letters next to each other).
'oddly' is an anagram indicator (letters in an odd order).
'side' put after 'boy' is 'boyside'.
'boyside' anagrammed gives 'DISOBEY'.
Can you help me to learn more?
(Other definitions for disobey that I've seen before include "Yobs die (anag.)" , "Disregard" , "Refuse to take orders" , "Defy" , "Contravene" .)