Burrowing animal (6)
I believe the answer is:
rabbit
'burrowing animal' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rabbit that I've seen before include "8's friend with relations" , "See 17" , "Roger, Peter or Brer" , "Waffle" , "Come up with a solution and pull one out of the hat" .)