Carefree (as a French suburb) (4,5)

I believe the answer is:

sans souci

(Other definitions for sans souci that I've seen before include "Potsdam palace built by Frederick the Great" , "lack of care" , "Prussian palace" , "Frederick the Great's Potsdam palace" , "Without care or worry (Fr.); Frederick the Great's palace" .)

I've seen this clue in the Sydney Morning Herald.

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.