Lot unit (4)
I believe the answer is:
acre
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lot unit</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for acre that I've seen before include "Care about the piece of land" , "Site of battle" , "Race (anag.)" , "Measure of land area" , "Ancient city in Israel" .)