Unseated from the said seat (6)
I believe the answer is:
thrown
'unseated' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for thrown that I've seen before include "Tossed" , "Defeated" , "given up intentionally" , "Rabindranath ---, Indian sage" , "Disconcerted, confused" .)