Some within advance Le Bon as star (5)
I believe the answer is:
celeb
'star' is the definition.
(I've seen this before)
'some within advance le bon' is the wordplay.
'some within' indicates a hidden word.
'CELEB' can be found hidden inside 'advance le bon'.
'as' acts as a link.
(Other definitions for celeb that I've seen before include "Prominent figure" , "Household name" , "Famous person (colloq.)" , "Big name" , "Famous person (abbr)" .)