Clue: Burrower twice shortened hidey-hole with one (8)
Answer: BISCACHA
Explanation: Burrower twice shortened hidey-hole with one (8)
**BIS** ("twice") + **CACH**(e) ("hidey-hole", *shortened*) + **A **("one") 
A viscacha or biscacha is a South American chichilla-like rodent.