Written law (7)
I believe the answer is:
statute
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">written law</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for statute that I've seen before include "Law recorded in book" , "Written law" , "Law, rule" , "Set taut (anag.)" , "Act of Parliament" .)