Osculate (4)
I believe the answer is:
kiss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">osculate</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for kiss that I've seen before include "lightness of touch?" , "Smooch" , "Act of love" , "Cross" , "Osculate" .)