This is a tricky issue. Clitoral circumcisions used to be done traditionally to remove the clitoris and not to bare it. The hood on the clitoris is variable in different individuals and is not the same. In some, after stimulation the clitoris is more visible and bare. The excision of the hood can be done and is a very delicate procedure and if not done properly can lead to damage to the clitoris. Complication wise, there is the risk of a painful scar around the clitoris and in some cases loss of sensation also. It is not a very commonly done procedure.
Please contact a plastic surgeon to have her evaluated for such a procedure, after considering the risks involved.