Crossword Genius

Replace what you've got with something better (5,2)

Ross

I believe the answer is:

trade up

(Other definitions for trade up that I've seen before include "Buy larger house" , "Buy a bigger property" , "Move to a larger property" , "Buy a better model" .)

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.