Dressy attire that sounds casual (6,4)

I believe the answer is:

lounge suit

(Other definitions for lounge suit that I've seen before include "Attire" , "Formal wear" , "Smart day wear for men" , "Common habit of man" , "Smart clothing" .)

I've seen this clue in the LA 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.