Graduate has rewritten manual (6)
I believe the answer is:
alumna
'graduate' is the definition.
(term for a female graduate)
'rewritten manual' is the wordplay.
'rewritten' indicates an anagram.
'manual' with letters rearranged gives 'ALUMNA'.
'has' acts as a link.
(Other definitions for alumna that I've seen before include "Female former pupil" , "Harvard graduate" , "Manual (anag) - old girl" , "Female graduate" , "She studied" .)