Transmogrify mom to reshape faults (12)
I believe the answer is:
metamorphose
'transmogrify' is the definition.
(synonyms)
'mom to reshape faults' is the wordplay.
'faults' is an anagram indicator (I've seen 'fault' mean this (a faulty spelling)).
'mom'+'to'+'reshape'='momtoreshape'
'momtoreshape' with letters rearranged gives 'METAMORPHOSE'.
(Other definitions for metamorphose that I've seen before include "Transform" , "Develop into another form" , "Change completely" , "Undergo drastic change" .)