Obscure Communist law (6)
I believe the answer is:
redact
'obscure' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'communist law' is the wordplay.
'communist' becomes 'red' (red can informally mean communist).
'law' becomes 'act' (I've seen this before).
'red'+'act'='REDACT'
Can you help me to learn more?
(Other definitions for redact that I've seen before include "Traced badly to edit" , "put into literary form" , "Prepare for publication" , "Prepare to publish" , "Edit and censor" .)