Punishable by law (9)
I believe the answer is:
statutory
'punishable by law' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for statutory that I've seen before include "Of written law as to a trusty" , "Relating to written law" , "Try-outs at being required by law" , "According to law" , "Enshrined in law" .)