Expression of surprise (3)

I think it could be either:

Which length description are you looking for?:

gee

'expression of surprise' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for gee that I've seen before include "Gracious" , "Urge horse - expression of surprise" , "provided by substitute for ginger?" , "Well I never" , "move faster" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.