In Animal Farm, what does Clover represent in history and what does she look like?

Clover is a female horse who is Boxer's close friend.  She symbolizes the women of the Revolution.  She is a motherly figure who is caring and provides comfort to the other animals.  She is a firm believer in Napoleon, but is sometimes suspicious.

Clover is described as being a bit dumpy, having never gotten her figure back after her fourth foal.  She is a cart horse, not a sleek pretty horse like Mollie. 

Although Clover does not represent any person in history in particular, she does represent the working class women in Russia.  They worked as hard as the men for the same empty promises of Communism.