Put in systematic order (7)
I believe the answer is:
arrange
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">put in systematic order</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 arrange that I've seen before include "Set in order" , "Organise, plan" , "Put in neat order" , "Put in order - organise" , "Sort" .)