Square one? (4)
I believe the answer is:
nerd
'square one?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nerd that I've seen before include "Boring person" , "Obsessive," , "Feeble person (sl.)" , "Boringly studious person" , "Someone boring (about computers?)" .)