Wayward Roman girl (5)
I believe the answer is:
norma
'girl' is the definition.
'wayward roman' is the wordplay.
'wayward' is an anagram indicator (wayward means out of control or chaotic).
'roman' with letters rearranged gives 'NORMA'.
(Other definitions for norma that I've seen before include "Shearer or Major" , "The 'Rule' constellation" , "Female" , "Bellini heroine" , "Bellini opera - girl's name" .)