A gent thrown off state ground leading to a royal house (6)
I believe the answer is:
tudors
'a gent thrown off state ground' is the definition.
I can't tell whether this definition defines the answer.
'leading to a royal house' is the wordplay.
'leading' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'to a' means one lot of letters go next to another (I've seen this in other clues).
'royal house' becomes 'tudor' (Tudor is an example).
's' after 'tudor' is 'TUDORS'.
Can you help me to learn more?
(Other definitions for tudors that I've seen before include "Royal family" , "English dynasty in the 16th century" , "English royal house" , "Royalty" , "English monarchs from Henry VII to Elizabeth I" .)