Japanese entertainer’s portion of wage is halved (6)
I believe the answer is:
geisha
'japanese entertainer's' is the definition.
(geishas traditionally hosted or entertained men)
'portion of wage is halved' is the wordplay.
'portion of' indicates the answer is hidden within the clue.
'GEISHA' is hidden in the letters of 'wage is halved'.
(Other definitions for geisha that I've seen before include "Japanese girl trained to entertain men" , "A Japanese woman who entertains men" , "Traditional Japanese female entertainer of men" , "Entertaining girl" , "Professional female companion for Japanese men" .)