Relating to punishment (5)
I believe the answer is:
penal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">relating to punishment</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 penal that I've seen before include "Deliberately unpleasant" , "Involving legal punishment" , "Involving punishment as by the law" , "Relating to legal punishment" , "Punishing" .)