24 6 19 16 for 2? (3,5,3)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Double definition. Writing out the solutions referred to in the clue, we get REED FILM GREENE SCRIPTED for PHILBY?, which leads us to the 1949 film, written by Graham Greene, directed by Carol Reed, as well as to the real-life Cambridge spy ring of which Kim Philby was identified as the third man in 1963