Secret supply (5)
I believe the answer is:
stash
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">secret supply</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stash that I've seen before include "Stow away" , "(Illegal) hoard" , "(Hidden store of) drugs" , "Consignment of drugs" , "Squirrel away" .)