Authorisation (3-2)
'authorisation' is the definition.
(I know that permission is a type of authorisation)
This is the entire clue.
(Other definitions for permission that I've seen before include "Visa, eg" , "Consent, authorisation" , "Allowance" , "Leave" , "Green light" .)
'authorisation' is the definition.
(I know that authorisation can be written as say-so)
This is the entire clue.
(Other definitions for say-so that I've seen before include "Authority - rumour" , "Authority to make or allow something to happen" , "Authority to make a decision" , "Authorisation" , "Mere assertion (colloq.)" .)
'authorisation' is the definition.
(I know that sanction is a type of authorisation)
This is all the clue.
(Other definitions for sanction that I've seen before include "Give final permission" , "Endorsement" , "Give official approval or attach a penalty to" , "Permit - punishment for breach of treaty" , "Permission or approval as for course of action" .)