Pillar (6)
I believe the answer is:
column
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pillar</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for column that I've seen before include "Pillar - newspaper slot" , "Linear display, of numbers say" , "Round pillar or newspaper article" , "Post" , "Vertical structure" .)