Some charming injury (4)
I believe the answer is:
harm
'injury' is the definition.
(I know this)
'some charming' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'HARM' is hidden within 'charming'.
(Other definitions for harm that I've seen before include "Trials, exams" , "See 13" , "Detriment" , "Injure, injury" , "Wound" .)