Answer:

coen

Answer	Crossword Clue
COEN	"Fargo" director Joel
COEN	Either of two brothers who share four Academy Awards
COEN	Fraternal film name

COEN	Filmmaker Joel or Ethan
COEN	Brotherly name in film
COEN	Ethan or Joel of movies
COEN	"Fargo" credits surname
COEN	"Fargo" director
COEN	Either "No Country for Old Men" director
COEN	Either "Burn After Reading" director
COEN	"The Big Lebowski" director

COEN	"Barton Fink" director
COEN	"The Man Who Wasn't There" director
COEN	Either 2007 Best Director
COEN	Either director of "No Country for Old Men"
COEN	Either "Raising Arizona" director
COEN	Either of two filmmaking brothers
COEN	Either "True Grit" (2010) director
COEN	Filmmaker Ethan or Joel

COEN	Either "A Serious Man" director
COEN	Either "Fargo" director
COEN	Ethan or Joel of "Fargo"
COEN	Ethan or Joel of "The Big Lebowski"
COEN	Filmmaker Ethan
COEN	"The Big Lebowski" director Joel
COEN	"Fargo" producer
COEN	Either directing brother of "The Ladykillers"

COEN	Director of "The Man Who Wasn't There"
COEN	"Fargo" filmmaker Joel or Ethan
COEN	Director Joel or Ethan
COEN	Ethan or Joel of "True Grit"
COEN	Joel or Ethan
COEN	Either director of "Inside Llewyn Davis"
COEN	Either 2010 "True Grit" director
COEN	Film honcho Joel or Ethan

COEN	Ethan or Joel of Hollywood
COEN	"Fargo" family name
COEN	Cinematic brothers' surname
COEN	Directing brothers' surname
COEN	Filmmaker family name