English royal dynasty (5)
I believe the answer is:
tudor
'english royal dynasty' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tudor that I've seen before include "Architectural style" , "Rose" , "Regal family" , "Pertaining to the period 1485-1603" , "Dynasty on the English throne 1485-1603" .)