Stairs (5)
I believe the answer is:
steps
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stairs</span>' is the definition.<br/ ><span class="explanation-format__explanation">(steps is a kind of stairs)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for steps that I've seen before include "dancing?" , "John Buchan used 39 of them" , "Stages; ladder" , "stair" , "Stairs; paces" .)