Unit of farmland (4)
I believe the answer is:
acre
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unit of farmland</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 acre that I've seen before include "Unit of land measurement" , "Israeli seaport" , "Care about this bit of land" , "Measure of land area" , "Unit of area - Israeli port" .)