1: Author and actress receiving gold choker, originally (7)
 9: Toff aimed to do himself proud. (11)
 10: Finished holding second half of tour; it's lasted (7)
 12: Drawing, for example, a bit of a cartoon (3)
 13: Plan to return with woman (3)
 14: Complain about the horse (3)
 15: Ever-practical, Mr. Vader keeps own little piggy (4-2-5)
 17: Mend a split state (11)
 20: Clean oneself, but in reverse (3)
 22: Freshen the atmosphere (3)
 23: Man, what an avant-garde US artist! (3)
 24: Ray's about to remain undisturbed by  reflections  (7)
 25: Stimulant produced as choir paid off (11)
 27: Computer screen is OK with time sped up (7)
 28: Plots get Cuban revolutionary leader in a terrible mess (7)