Burrowing rodent of hot dry regions of Asia and Africa (6)
I believe the answer is:
gerbil
(Other definitions for gerbil that I've seen before include "Mouse-like desert rodent with long hind legs" , "Desert rodent, often kept as a pet" , "Burrowing desert rodent" , "Mouse-like rodent (G not J)" , "Leg plus rib of a mouse-like desert rodent" .)