Writer of Dickensian sketches (3)
I believe the answer is:
boz
'writer of dickensian sketches' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for boz that I've seen before include "Dickens's pen name" , "Dickens's pseudonym" , "Pseudonym of Charles Dickens" , "Sketch writer" , "Sketches by - (Dickens)" .)