A New Hope is she (6)
I believe the answer is:
sophie
'she' is the definition.
(I've seen this before)
'a new hope is' is the wordplay.
'a new' is an anagram indicator.
'hope'+'is'='hopeis'
'hopeis' with letters rearranged gives 'SOPHIE'.
(Other definitions for sophie that I've seen before include "Girl's name" , "Dahl perhaps" , "Hope is confused for this girl" , "--'s Choice, novel by William Styron" .)