Pampas cowboy (6)
I believe the answer is:
gaucho
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pampas cowboy</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 gaucho that I've seen before include "Cowboy of the South American pampas" , "Plain-living person" , "Ranch hand" , "Argentinian cattle-herder" , "A cough (anag)" .)