Answer:

drillmaster

Answer	Crossword Clue
DRILLMASTER	Military trainer
DRILLMASTER	Instructor of a kind.
DRILLMASTER	Dentist, in a way

DRILLMASTER	Severe disciplinarian
DRILLMASTER	Dentist?
DRILLMASTER	One who can have you going around in circles?
DRILLMASTER	Ace in the hole business?
DRILLMASTER	Person who barks?
DRILLMASTER	Squad trainer
DRILLMASTER	March leader
DRILLMASTER	Overseer of private practice