Dealer's name obtained by king (8)
I believe the answer is:
chandler
'dealer's' is the definition.
(I've seen this before)
'name obtained by king' is the wordplay.
I cannot quite see how this works, but
'name' could be 'handle' (a handle is a name) and 'handle' is found within the answer.
'king' could be 'cr' (short for Carolus Rex, King Charles in Latin) and 'cr' is found in the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for chandler that I've seen before include "Merchant" , "Dealer in specialized merchandise" , "Old storekeeper" , "Maker of candles" , "Dealer in marine goods" .)