Pen for livestock (6)
I believe the answer is:
corral
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pen for livestock</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for corral that I've seen before include "Round up" , "An enclosure for horses or cattle" , "Horse enclosure out West" , "Pen for cattle in the US" , "Famous gunfight at the OK ..... in American West" .)