Hostess with many fans? (6)

I believe the answer is:

geisha

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'hostess' is the definition.
(Japanese woman hosting or entertaining men)

I don't understand the rest of the clue.

(Other definitions for geisha that I've seen before include "Entertaining girl" , "Japanese woman, trained to entertain men" , "He's a GI (anag.)" , "Professional female companion in Japan" , "One employed to look after men" .)

I've seen this clue in The Sun.

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