A professor of infinite wisdom (4-3)
I believe the answer is:
know-all
This clue could be a double definition.
'a professor' is the first definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'infinite wisdom' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for know-all that I've seen before include "One who thinks they have all the answers" , "Someone who refuses to accept advice or information from others" , "Self-styled polymath" , "Person who behaves like encyclopedia 94-3)" , "Person who thinks he has all the answers" .)