Cash drawer (4)
I believe the answer is:
till
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cash drawer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(till can mean a cash register)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for till that I've seen before include "Cash machine" , "store for money" , "there's money in it" , "Cashbox" , "Work the land for cultivation" .)