"African Queen" screenwriter (4)
I believe the answer is:
agee
'african queen screenwriter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for agee that I've seen before include "off the straight on Princes Street" , "off the straight at Gleneagles" , "American writer" , "In Ayr not straight" .)