American burrowing rodent (6)
I believe the answer is:
gopher
'american burrowing rodent' is the definition.
(I've seen this before)
This is the entire clue.
(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" .)