One apprehended by journalist with court order (5)
I believe the answer is:
edict
'order' is the definition.
(synonyms)
'one apprehended by journalist with court' is the wordplay.
'one' becomes 'i' (Roman numeral).
'apprehended by' means one lot of letters go next to another.
'journalist' becomes 'ed' (short for editor).
'with' is a charade indicator (letters next to each other).
'court' becomes 'ct' (abbreviation used in road names).
'i' after 'ed' is 'edi'.
'edi'+'ct'='EDICT'
(Other definitions for edict that I've seen before include "Order issued by an authority" , "Injunction" , "Legally binding proclamation" , "Declaration" , "Formal proclamation" .)