表被动
我的答案过于简单,但是确实是表被动
如果去掉was,也是表示她穿衣的方式（风格）,不过是她自己（主动）穿的.
例：
She is a cute little girl,I love the way she was dressed.可能衣服是她妈妈,别人帮她穿的.
She is a charming woman,I love the way she dressed.可能是自己穿的,我喜欢她的穿衣风格.