Avis offering
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">avis offering</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rental that I've seen before include "4 across (anag)" , "Charge to hirer" , "Let" , "Amount paid for hire" , "Cost of hire" .)