Linear display (6)
I believe the answer is:
column
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">linear display</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for column that I've seen before include "Capital heading, perhaps on this" , "Pillar - contribution to newspaper" , "Pillar - newspaper section" , "Supporting pillar" , "Trajan's or Nelson's" .)