Having once been in show business, got out of (7)
I believe the answer is:
exacted
'got out of' is the definition.
The answer and definition can be both to do with communicating as well as being past participle verbs.
Perhaps you can see a link between them that I can't see?
'having once been in show business' is the wordplay.
I cannot really understand how this works, but
'once' could be 'ex' (prefix meaning former or onetime) and 'ex' is found within the answer.
'show' could be 'act' (act is a kind of show) and 'act' is present in the answer.
The remaining letters 'ed' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for exacted that I've seen before include "Insisted on and obtained, say payment" , "Obtained by force" , "Insisted on and obtained - in precise way?" , "forced out" , "'Claimed, demanded (7)'" .)