Steps of a ladder (5)
I believe the answer is:
rungs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">steps of a ladder</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 rungs that I've seen before include "Crosspieces of a ladder" , "bars" , "Ladder parts" , "Steps of a ladder" .)