Anglo-Saxon aristocrat (5)
I believe the answer is:
thane
'anglo-saxon aristocrat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for thane that I've seen before include "Macbeth was made -- of Cawdor" , "Macbeth's Cawdor title" , "Ancient Scottish nobleman" , "Scot who held land from the king" , "Anglo-Saxon aristocrat - old Scottish clan chief" .)