Walk back and forth (4)
I believe the answer is:
pace
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">walk back and forth</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 pace that I've seen before include "Gait" , "Stride" , "Tempo, rate of moving" , "Speed of a single step?" , "politely expressing disagreement" .)