Organic fence (8)
I believe the answer is:
hedgerow
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">organic fence</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 hedgerow that I've seen before include "Growth around field" , "Field boundary" , "Bushy boundary" , "Line of shrubs as barrier" , "Greenery between fields" .)