Devious aunt cheated, it can be verified (13)
I believe the answer is:
authenticated
'be verified' is the definition.
(thesaurus)
'devious aunt cheated it' is the wordplay.
'devious' is an anagram indicator.
'aunt'+'cheated'+'it'='auntcheatedit'
'auntcheatedit' with letters rearranged gives 'AUTHENTICATED'.
'can' acts as a link.
(Other definitions for authenticated that I've seen before include "Shown to be true" , "proved to be genuine" , "Certified" , "Established as genuine" , "Validated" .)