Run at a moderate pace (4)
I believe the answer is:
trot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">run at a moderate pace</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for trot that I've seen before include "An elderly woman" , "Radical socialist (abbr) - horse gait" , "Run with short steps" , "Move briskly" , "Go at steady pace" .)