Posh artist taken with return of star and planet (6)
I believe the answer is:
uranus
'planet' is the definition.
(Uranus is an example)
'posh artist taken with return of star' is the wordplay.
'posh' becomes 'u' (abbreviation for upper-class - opposite to non-u).
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'taken with' means one lot of letters go next to another.
'return of' shows that the letters should be reversed in order.
'star' becomes 'sun' (Sun is an example).
'sun' in reverse letter order is 'nus'.
'u'+'ra'+'nus'='URANUS'
'and' is the link.
(Other definitions for uranus that I've seen before include "Planet beyond Saturn" , "A major planet or the most ancient Greek god" , "space traveller" , "world" , "Holst's Magician planet" .)