Meryl of movies (6)
I believe the answer is:
streep
'meryl of movies' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for streep that I've seen before include "Meryl --, Oscar winner" , "Meryl -, US actress" , "See 22" , "See 4 Down" , "Film star in The Iron Lady, b. 1949" .)