In retirement, God's taken to court (4)
I believe the answer is:
sued
'taken to court' is the definition.
(to sue someone is to take them to court)
'in retirement god's' is the wordplay.
'in retirement' shows that the letters should be reversed in order (retire can mean to go back or backwards).
'god' becomes 'deus' (I've seen this before).
'deus' written backwards gives 'SUED'.
(Other definitions for sued that I've seen before include "taken to court" , "Brought an action against" , "Took legal action against" , "Prosecuted" , "Started legal proceedings against (someone)" .)