Actress Mirren (5)
I believe the answer is:
helen
'actress mirren' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for helen that I've seen before include "Woman taken to Troy by Paris" , "Trojan war beauty" , "Beautiful daughter of Zeus and Leda who was abducted by Paris" , "Greek woman famed for beauty" , ""The face the launched 1,000 ships"" .)