Stow away
I believe the answer is:
stash
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stow away</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 stash that I've seen before include "Secret store (colloq.)" , "Treasure trove" , "Secret store of valuables" , "Squirrel away" , "Cache" .)