Monster in the maze with the head of a bull and the body of a man (8)
I believe the answer is:
minotaur
(Other definitions for minotaur that I've seen before include "Creature, half-man and half-bull, slain by Theseus in the Cretan maze" , "Mythological man-bull" , "Beast of legend" , "Mythical beast of Crete" , "Bull-headed Cretan monster" .)