1968 novel by Charles Portis, filmed by Henry Hathaway in 1969 and by the Coen brothers in 2010 (4,4)

I believe the answer is:

true grit

(Other definitions for true grit that I've seen before include "movie" , "Genuine courage (John Wayne's)" , "vehicle for John Wayne" , "Western" , "Film" .)

I've seen this clue in The Independent.

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