Clue: Share Jill Masterson's fate, and it's goodbye! (5)
Answer: ADIEU
Explanation: Definition: goodbye

**DIE** *in* **Au **(chemical symbol for gold) which is what Jill Masterton did in *Goldfinger*. 
 
*Having been knocked out by Goldfinger's henchman, Oddjob, she is painted all over in gold paint, supposedly dying of skin asphyxiation, although the validity of dying from this method has been questioned since. In the movie, she was played by Shirley Eaton.