Terrier breed (4)
I believe the answer is:
skye
'terrier breed' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for skye that I've seen before include "Large Scottish island" , "Scots isle" , "Home of the Cuillin mountains" , "Largest Inner Hebridean island" , "Where Bonnie Prince Charlie fled after his defeat at Culloden" .)