Scottish terrier (4)
I believe the answer is:
skye
'scottish terrier' 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 "Where Bonnie Prince Charlie fled after his defeat at Culloden" , "Island - keys (anag)" , "Scot. island, toll bridge" , "Scotland island" , "Portree's isle" .)