Kids' running game
I believe the answer is:
tag
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">kids' running game</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 tag that I've seen before include "stock quotation" , "Ticket" , "Children's chasing game" , "Identity disc" , "Label (to attach)" .)