Actress Johnson of "Brief Encounter" (5)
I believe the answer is:
celia
'actress johnson of brief encounter' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for celia that I've seen before include "lady" , "Rosalind's cousin" , "Character in Tales from Shakespeare" , "Daughter to Frederick" , "Frederick's daughter" .)