Real ingenue corrupted (7)
I believe the answer is:
genuine
'real' is the definition.
(I know that real can be written as genuine)
'ingenue corrupted' is the wordplay.
'corrupted' is an anagram indicator.
'ingenue' with letters rearranged gives 'GENUINE'.
(Other definitions for genuine that I've seen before include "Sincere; authentic" , "Ingenue - the real McCoy" , "Real; sincere" , "Native" , "Real, not faked" .)