Concerned with the scientific side of the law (8)
I believe the answer is:
forensic
'concerned with the scientific side of the law' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for forensic that I've seen before include "Used in law courts, like conifers" , "Related to law courts" , "Concerned with the scientific side of the law" , "Appropriate to argument" , "Of or used in law courts, as in medicine" .)