Orderly grouping (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">orderly grouping</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for array that I've seen before include "Matrix; finery" , "Order - arrangement" , "Rich clothing" , "Impressive arrangement" , "Lay out, arrange" .)