Charming about mischief (4)
I believe the answer is:
harm
'mischief' is the definition.
(thesaurus)
'charming about' is the wordplay.
'about' indicates the answer is hidden within the clue.
'HARM' is hidden within 'charming'.
(Other definitions for harm that I've seen before include "Hurt, maim" , "Trials, exams" , "See 13" , "Hurt, injure" , "Damage, hurt" .)