Minor eminence's absorbing humour, a bumptious so-and-so (4-2-3)
I believe the answer is:
know-it-all
(Other definitions for know-it-all that I've seen before include "Smart alec" , "Unteachable bigot" .)
I've seen this clue in The Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.