American burrowing rodent (6)
I believe the answer is:
gopher
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">american burrowing rodent</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for gopher that I've seen before include "mine" , "US ground squirrel" , "Burrowing US rodent" , "Rodent - wood of Noah's Ark" , "Rodent with large cheek pouches" .)