Whom a humor-writing prize is named for (7)
I believe the answer is:
thurber
'whom a humor-writing prize is named for' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for thurber that I've seen before include "James --, US humorist" , "US writer" , "See 22" , "James, humorous writer" , "See 8" .)