smartly turned out in a T-shirt and shorts
Can a t-shirt and shorts ever really be classified as "smart"?! If so, I think perhaps we need to raise the bar a little!

This isn't to say that I never wear a t-shirt and shorts. But when I do, I definitely don't feel like I'm smartly turned out. At best, it's extremely casual wear that's best suited to daytime outdoor events in hot weather. With beer involved.