Part of SE England known to the Scots (4)
I believe the answer is:
kent
I believe this clue is a double definition.
'part of se england' is the first definition.
(county in South East England)
'known to the scots' is the second definition.
(past tense of 'ken', Scottish term meaning to know)
(Other definitions for kent that I've seen before include "One of the Home Counties" , "Southern English county" , "English architect and landscape gardener" , "Canterbury's county" , "County of SE England" .)