(n.) a celebrity lesbian; a lesbian famous or popular within the LGBT community, including but not limited to actors, advocates, promoters, club owners, writers, etc.
quite simply this term is a contraction of "celebrity" and "lesbian". Of course that means that she's famous, even if only for the Warholian 15 minutes, or for much longer.
Ellen Degeneres is a notorious celesbian. She was the first to "come out" on TV. Thing about that is, the lovely Laura Dern should've been kissing me instead ; )
2. Other celesbians are Melissa Etheridge (she "came out" during Prez. Bill Clinton's inaugeration bashola), k d lang, Tracy Chapman, the Indigo Girls, Phranc, Amanda Bearce, Candace Gingrich, Dick Chaney's daughter (yes), Rosey O'Donnell and many more.