I think that's what these pieces scream...She Means Business!
Banana Republic does a great job of interpreting menswear in a beautifully tailored and strongly effeminate way.
For example, these suede oxfords have the spectator stitching and wing-tip detail but the heel height and tassels on the laces are decidedly sweet touches.
Banana Republic High-heel Oxford @ 150
And then this blazer and skirt is breathtaking to me. Initially I thought this was a vest with a portrait collar bolero layered, but when you learn that it's one piece...it's absolutely brilliant