Man of the North, as James I was in Scotland! (6)
I believe the answer is:
viking
'man of the north' is the definition.
(the Vikings were a northern European people)
'james i was in scotland' is the wordplay.
I cannot really see how this works, but
'i' is within the answer.
'in' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'as' acts as a link.
(Other definitions for viking that I've seen before include "Norse seafarer" , "Norse trader, pirate" , "Norseman" , "Scandinavian raider" , "Scandinavian pirate of 8th11th centuries" .)