Inaccurately portray reformed miser here (12)
I believe the answer is:
misrepresent
'inaccurately portray' is the definition.
(represent in an inaccurate way)
'reformed miser here' is the wordplay.
'reformed' is an anagram indicator.
'here' becomes 'present' (similar in meaning).
'miser' anagrammed gives 'misre'.
'misre'+'present'='MISREPRESENT'
(Other definitions for misrepresent that I've seen before include "Give a false account of (something)" , "Falsely state" , "Give inaccurate portrayal" .)