Artist restrained by injunction after misbehaviour of lead star (9)
I believe the answer is:
aldebaran
'star' is the definition.
(Aldebaran is an example)
'artist restrained by injunction after misbehaviour of lead' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'restrained by' means one lot of letters goes inside another.
'injunction' becomes 'ban' (I've seen this in other clues).
'after' is a charade indicator (letters next to each other).
'misbehaviour of' indicates anagramming the letters.
'lead' is an anagram of 'alde'.
'ban' after 'alde' is 'aldeban'.
'ra' inserted inside 'aldeban' is 'ALDEBARAN'.
(Other definitions for aldebaran that I've seen before include "Red giant in Taurus" , "Dear Laban (anag) - star in Taurus" , "big star" , "Taurus's leading star" , "Highlight" .)