Prosecute girl (3)
I believe the answer is:
sue
This clue is a double definition.
'prosecute' is the first definition.
(thesaurus)
'girl' is the second definition.
(Other definitions for sue that I've seen before include "Litigious girl" , "Take legal case against" , "Legally challenge" , "Institute legal proceedings (against someone)" , "Bring charges against - girl" .)