Wicked deeds of some nursemaid being naughty (13)
I believe the answer is:
misdemeanours
'wicked deeds' is the definition.
(misdemeanours are wrongdoings)
'some nursemaid being naughty' is the wordplay.
'being naughty' indicates an anagram.
'some'+'nursemaid'='somenursemaid'
'somenursemaid' anagrammed gives 'MISDEMEANOURS'.
'of' acts as a link.
(Other definitions for misdemeanours that I've seen before include "they might be punished" , "Minor offences" .)