Sunbathe naked to entertain Olympian (6)
I believe the answer is:
athena
'olympian' is the definition.
(Greek goddess who lived on Mount Olympus)
'sunbathe naked to entertain' is the wordplay.
'to entertain' says the answer is hidden in the clue (I've seen 'entertains' mean this (the answer is welcomed or entertained by the clue)).
'ATHENA' is hidden within 'sunbathe naked'.
(Other definitions for athena that I've seen before include "Greek goddess of a capital city" , "wise but fierce goddess" , "Greek goddess of wisdom etc." , "One-time goddess" .)