It's enforced as naughty child does wrong (7)
I believe the answer is:
imposed
'it's enforced' is the definition.
('impose' can be a synonym of 'enforce')
'naughty child does wrong' is the wordplay.
'naughty child' becomes 'imp' (I've seen this before).
'wrong' is an anagram indicator.
'does' anagrammed gives 'osed'.
'imp'+'osed'='IMPOSED'
'as' acts as a link.
(Other definitions for imposed that I've seen before include "Forced to be accepted" , "Thrust oneself upon" , "set as a task" , "enforced" .)