Got rid of king, conspiracy theorist ultimately admitted (6)
I believe the answer is:
kicked
'got rid of' is the definition.
Although both the answer and definition are past participle verbs, I can't understand how one could define the other.
'king conspiracy theorist ultimately admitted' is the wordplay.
'king' becomes 'K' (chess abbreviation).
'conspiracy theorist' becomes 'icke' (I can't justify this - if you can you should give a lot more credence to this answer).
'ultimately' says to take the final letters.
The last letter of 'admitted' is 'd'.
'k'+'icke'+'d'='KICKED'
Can you help me to learn more?
(Other definitions for kicked that I've seen before include "Struck with the foot" , "Lashed out with foot" , "Hit with foot" , "Booted" .)