It has three feet (4)
I believe the answer is:
yard
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">it has three feet</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 yard that I've seen before include "36 inches" , "Three feet out the back" , "American garden" , "Enclosed area; length" , "Thirty six inches" .)