Crossword Genius

United foolish to sub centre for Oscar (2,3)

Ross

I believe the answer is:

in one

I'm a little stuck... Click here to teach me more about this clue!

'united' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for in one that I've seen before include "united" , "A hole . . . . . is a singular golf score" , "Combined" , "As a single unit" .)

I've seen this clue in The Times and The Sunday Times.
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.