Fast runners (5)
I believe the answer is:
hares
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fast runners</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 hares that I've seen before include "Fast-running animals" , "Fast animals" , "Shares out the swift little animals" , "Fleet-footed animals" , "Swift long-eared mammals" .)