Amended deed includes it when revised (6)
I believe the answer is:
edited
'revised' is the definition.
(I've seen this before)
'amended deed includes it' is the wordplay.
'amended' is an anagram indicator.
'includes' indicates putting letters inside.
'deed' is an anagram of 'eded'.
'eded' going around 'it' is 'EDITED'.
'when' is the link.
(Other definitions for edited that I've seen before include "Prepared a paper" , "garbled" , "Changed text" , "altered for publication" , "Prepared printed material for publication" .)