Uncool sort (5)
I believe the answer is:
dweeb
'uncool sort' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dweeb that I've seen before include "Insignificant student" , "techie bore?" , "Boringly studious student" , "Nerd - wimp" , "silly American" .)