Western gas brand
I believe the answer is:
arco
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">western gas brand</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 arco that I've seen before include "which every violinist must grasp" , "Musical direction" , "taking a bow" , "bow for players" , "Played with the bow" .)