___ Postlethwaite, whom Spielberg once called "the best actor in the world" (4)
I believe the answer is:
pete
(Other definitions for pete that I've seen before include "filmed with his 1 across [DRAGON]" , "Small 14 [PETER JONES]" , "- Sampras, tennis star" , "- Seeger, US folk singer" , "-- Sampras, tennis ace" .)