Ratification contains error (8)
I believe the answer is:
sanction
'ratification' is the definition.
(I've seen this before)
'contains error' is the wordplay.
'error' is an anagram indicator.
'contains' anagrammed gives 'SANCTION'.
(Other definitions for sanction that I've seen before include "Permission or approval as for course of action" , "Ratification" , "Allow; punish" , "Go-ahead" , "Permit - punishment for breach of treaty" .)