Go after sex appeal in heavenly body (6)
I believe the answer is:
saturn
'heavenly body' is the definition.
(Saturn is an example)
'go after sex appeal' is the wordplay.
'go' becomes 'turn' ('turn' can be a synonym of 'go'**).
'after' is a charade indicator (letters next to each other).
'sex appeal' becomes 'sa'.
'turn' put after 'sa' is 'SATURN'.
'in' is the link.
(Other definitions for saturn that I've seen before include "Nearest ringed planet" , "Giant planet" , "Runs at (anag) - Roman god" , "Sixth rock from the sun" , "tried to pass vessel" .)