Crossword Genius

Unexpectedly, I came across rogue professor (8)

Ross

I believe the answer is:

academic

I'm a little stuck... Click here to teach me more about this clue!

'professor' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'unexpectedly i came across rogue' is the wordplay.
'unexpectedly' indicates an anagram.
'across' is an insertion indicator.
'rogue' becomes 'cad' (I've seen this in another clue).
'i'+'came'='icame'
'icame' with letters rearranged gives 'aemic'.
'aemic' going around 'cad' is 'ACADEMIC'.

Can you help me to learn more?

(Other definitions for academic that I've seen before include "Scholar - relating to a college" , "Scholarly or of a university" , "Scholarly as opposed to practical (8)" , "Well-read" , "Unimportant" .)

I've seen this clue in The Guardian.
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