Contains forged permit (8)
I believe the answer is:
sanction
'permit' is the definition.
(I've seen this before)
'contains forged' is the wordplay.
'forged' indicates anagramming the letters.
'contains' with letters rearranged gives 'SANCTION'.
(Other definitions for sanction that I've seen before include "Official permission or authority" , "Allow; penalty" , "Permit - punishment for breach of treaty" , "OK" , "Allow; punish" .)