Official pardon (7)
I believe the answer is:
amnesty
'official pardon' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for amnesty that I've seen before include "Period of forgiveness for infractions" , "Men stay (anag.)" , "Dispensation" , "International organisation concerned with human rights" , "A general pardon as for rebels (7)" .)