Rough dog (5)
I believe the answer is:
husky
I believe this clue is a double definition.
'rough' is the first definition.
(thesaurus)
'dog' is the second definition.
(husky is a kind of dog)
(Other definitions for husky that I've seen before include "Sledge-pulling dog" , "Arctic sledge dog" , "Dog used in polar expeditions" , "Slightly hoarse; dog" , "strong and well-built" .)