What's a clergy?

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In another example of the declining influence of popular culture (which may not be all that of a bad thing), I had this conversation with an 18 year old girl who cut my hair today.

"Are you on your lunch break or did you have the day off to get your haircut?"

"Oh, I have a flexible work schedule. I am clergy." 

"What's a clergy?"

"Clergy? It is a minister."

"Oh. Cool. I read about clergy in my history books in school. With Rome and all that stuff. That is neat they are still around."

Neat indeed.