Male monarch (4)
I believe the answer is:
king
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">male monarch</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for king that I've seen before include "Court card" , "Playing card" , "Recipient of 10 21 [VELODROME GOLD]" , "Senior royal" , "as Solomon was" .)