Betting system (4)
I believe the answer is:
tote
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">betting system</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 tote that I've seen before include "record of stakeholders' investments" , "Drag; betting system" , "Large bag" , "Carry or shoulder" , "transport" .)