Column crossers (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">column crossers</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 rows that I've seen before include "Rackets" , "Tiers" , "Quarrels; ranks" , "Columns" , "Disagreements" .)