Relating to law courts (8)
I believe the answer is:
judicial
'relating to law courts' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for judicial that I've seen before include "Relating to a court of law" , "Of lawcourts or the administration of justice" , "Of a judge" , "Relating to law courts" , "Proceeding from a court of justice" .)