Ancient Briton said to have been chosen (4)

I believe the answer is:

pict

I'm a little stuck... Click here to teach me more about this clue!

'ancient briton' is the definition.
(ancient people in Scotland during Roman times)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for pict that I've seen before include "Old Scot" , "Early Scot" , "Ancient north Briton" , "Scotsman" , "Ancient Scot in Roman times" .)

I've seen this clue in The Globe and Mail.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.