Men are free to change handle (6)
I believe the answer is:
'change handle' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'men are free' is the wordplay.
'free' indicates anagramming the letters.
'menare' anagrammed gives 'RENAME'.
'to' is the link.
Can you help me to learn more?
(Other definitions for rename that I've seen before include "Brand again" , "Rechristen" , "Confer new appellation of meaner sort" , "Call again" , "Alter title of" .)