Old kings and queens from Stroud (6)
I believe the answer is:
tudors
'old kings and queens' is the definition.
I can't judge whether this definition defines the answer.
'from stroud' is the wordplay.
'from' indicates an anagram (the anagram comes from the same letters).
'stroud' anagrammed gives 'TUDORS'.
Can you help me to learn more?
(Other definitions for tudors that I've seen before include "English monarchs from Henry VII to Elizabeth I" , "Royal family" , "Members of a house" , "Members of English royal line" , "Royalty" .)