Junkyard dog
I believe the answer is:
cur
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">junkyard dog</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 cur that I've seen before include "Mongrel - coward" , "Base fellow" , "Inferior dog or one of mixed breed" , "Scoundrel; mongrel dog" , "Surly dog (or person)" .)