Answer: apale

AnswerCrossword Clue
APALEOn ... Horse (Piers Anthony novel about an incarnation of Death)
APALE"Behold ... Horse," Peck movie
APALE"Behold ... Horse" (William Cooper book)
APALE'Behold -- Horse' (1964 drama)
APALE. . . and behold .... horse. . . : Rev.