As one unit (2,4)
I believe the answer is:
en bloc
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">as one unit</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 en bloc that I've seen before include "Wholesale, as one unit" , "All together, en masse" , "As a group (Fr.)" , "All together (French)" , "As a whole (body)" .)