Chopped and changed it in East Germany twice (6)
I believe the answer is:
edited
'chopped and changed' is the definition.
(eg cutting down or changing a piece of writing)
'it in east germany twice' is the wordplay.
'germany twice' can mean two substitutions for 'germany'.
'in' indicates putting letters inside.
'east' becomes 'e' (synonyms).
'germany' becomes 'de' (I've seen this in other clues).
'germany' becomes 'd' (vehicle registration code for Deutschland).
'e'+'de'='ede'
'it' going into 'ede' is 'edite'.
'edite'+'d'='EDITED'
(Other definitions for edited that I've seen before include "Corrected" , "Prepared copy for publication" , "Redacted" , "Prepared text for publication" , "Changed text" .)