Penalise (6)
I believe the answer is:
punish
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">penalise</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for punish that I've seen before include "Like wordplay in speech" , "Flog" , "exact retribution" , "Possibly fine" , "Inflict a penalty upon" .)