Printing that treason hasn’t started (7)
I believe the answer is:
edition
'printing' is the definition.
(a particular edition of something printed)
'treason hasn't started' is the wordplay.
'treason' becomes 'sedition' (sedition is treason against a government or ruler).
'hasn't started' means to remove the first letter.
'sedition' with its first letter taken off is 'EDITION'.
'that' is the link.
(Other definitions for edition that I've seen before include "Copy - I tied on (anag)" , "Something impressed" , "I die not (anag)" , "Copies of book printed from one set of type" , "Volume" .)