Crossword Genius

Con attendee (4)

Ross

I believe the answer is:

nerd

(Other definitions for nerd that I've seen before include "Flag on poles; wide (headline)" , "Intelligent but single-minded expert" , "Sort of chap" , "Boring, trivia-obsessed type" , "Socially inept but knowledgeable person" .)

I've seen this clue in the USA Today.
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