What X may represent (4)
I believe the answer is:
kiss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">what x may represent</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for kiss that I've seen before include "lightness of touch?" , "Smooch" , "Gentle touch of the lips" , "Embrace" , "Eg, smacker, peck" .)