Old-time chap from Scotland chosen, did you say? (4)
I believe the answer is:
pict
'old-time chap from scotland' is the definition.
(the Picts were an ancient people of Scotland)
'chosen did you say?' is the wordplay.
'chosen' becomes 'picked' (picking is a kind of choosing).
'did you say?' indicates a 'sounds like' (homophone) clue.
'picked' sounds like 'PICT'.
(Other definitions for pict that I've seen before include "Very old person" , "Early Scot" , "Literary term for painted woman" , "Northerner" , "Ancient north Briton" .)