Peck on the cheek (4)
I believe the answer is:
kiss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">peck on the cheek</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 "Eg, smacker, peck" , "Snog" , "Greet with lips" , "Act of osculation" , "Cross" .)