Obligatory (10)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">obligatory</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for compulsory that I've seen before include "Mandatory" , "Obliged to be done" , "De rigueur" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">obligatory</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mandatory that I've seen before include "required" , "Not optional" , "Binding" , "Compulsory" , "Obligatory" .)