Sliding storage compartment (6)
I believe the answer is:
drawer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sliding storage compartment</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 drawer that I've seen before include "One who writes cheque; storage box" , "Artist" , "One sliding into e.g. chest" , "Sliding storage space" , "neither winner nor loser?" .)