Ancient Caledonian (4)

I believe the answer is:
pict
'ancient caledonian' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pict that I've seen before include "Ancient Scot in Roman times" , "N. British tribesman" , "Literary term for painted woman" , "Northerner" , "Ancient north Briton" .)