Author of 2 Kings (6,4)
I believe the answer is:
edward lear
'author of 2 kings' is the definition.
'edward lear' can be an answer for 'author' (I've seen this before). I'm not certain of the 'of 2 kings' bit.
'author of 2 kings' is the wordplay.
I cannot really see how this works, but
'author' could be 'lear' (I've seen this in another clue) and 'lear' is found within the answer.
'kings' could be 'edward' (I've seen this before) and 'edward' is located in the answer.
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 edward lear that I've seen before include "Humorist" , "Nonsense rhyme man" , "Author" , "19th century nonsense poet" , "II Kings" .)