Duke of York (6)
I believe the answer is:
andrew
'duke of york' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for andrew that I've seen before include "Warden (anag.)" , "- Motion, Poet Laureate" , "Ex-Poet Laureate" , "Scotland's patron saint" , "apostle" .)