Warehousing (7)
I believe the answer is:
storage
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">warehousing</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 storage that I've seen before include "Charge for warehousing" , "reservation?" , "Available space for keeping things" , "Space available for keeping goods" , "safekeeping" .)