Censor text of radical decree (6)
I believe the answer is:
redact
'censor text' is the definition.
'redact' can be an answer for 'censor' (I've seen this before). I also know that 'text' relates to this answer.
'radical decree' is the wordplay.
'radical' becomes 'red' (I've seen this in other clues).
'decree' becomes 'act' (I've seen this in other clues).
'red'+'act'='REDACT'
'of' is the link.
(Other definitions for redact that I've seen before include "Edit and censor" , "put into literary form" , "Censor part of a text for security reasons" , "Prepare to publish" , "Edit for publication" .)