Nerdy sort (4)
(Other definitions for geek that I've seen before include "Creep; misfit (sl.)" , "Computer obsessive" , "social misfit" , "Socially inept person" , "PC fanatic?" .)
'nerdy sort' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Another definition for dork that I've seen is " Socially inept person (US slang)".)