Answer: WILLPOWER

AnswerCrossword Clue
WILLPOWERDieter's need, often
WILLPOWERIt's used to break a habit
WILLPOWERSelf-control
WILLPOWERDetermination
WILLPOWERStrong-mindedness
WILLPOWERTyrone's untemptable relative
WILLPOWERHe's determined
WILLPOWERHe's got clout
WILLPOWERThe ability to publish a crossword in the "New York Times"?
WILLPOWERWhat George has?
willpowerthe power of the will