Sentence:  You must get a brown gown, and a white apron, and a <WSD>mob cap</WSD>, and we must make you a few wrinkles, and a little of the crowsfoot at the corner of your eyes, and you will be a very proper, little old woman. 
Meaning of the word marked with <WSD> tags:  A plain cap or headdress for women or girls, especially one tied under the chin by a very broad band.