Answer:

whodunit

AnswerCrossword Clue
WHODUNITChristie forte
WHODUNITSpecialty of 59A or 60A
WHODUNITStory that challenges you to guess the murderer
WHODUNITAgatha Christie specialty
WHODUNITMystery
WHODUNITMovie genre
WHODUNITEdgar Award candidate
WHODUNITPopular form of fiction.
WHODUNITMystery story (coined by Donald Gordon).
WHODUNITGardner product.
WHODUNITType of story.
WHODUNITExciting reading
WHODUNITChristie output
WHODUNITChristie mystery
WHODUNITChristie product
WHODUNITMurder mystery
WHODUNITSuspenseful sleuth story
WHODUNITChristie creation