Rental agreement (5)
I believe the answer is:
lease
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rental agreement</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 lease that I've seen before include "Ghost" , "Tenancy agreement" , "Rent (a property)" , "Contract for use of land or building" , "Let (property)" .)