No notice is required should you wish to do it (6)
I believe the answer is:
ignore
'no notice' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Perhaps you can see an association between them that I don't see?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for ignore that I've seen before include "'Disregard, overlook (6)'" , "Deliberately take no notice" , "Dismiss" , "Walk away from" , "Deliberately disregard" .)