Napkin's place (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">napkin's place</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lap that I've seen before include "400 metres, typically" , "Single circuit of track" , "Once around the course" , "Stage - circuit" , "Scoop up with the tongue" .)