Answer: gangbusters

AnswerCrossword Clue
GANGBUSTERSStrikingly successful
GANGBUSTERSRadio series begun in 1930's.
GANGBUSTERSRadio adventure series
GANGBUSTERSGreat guns
gangbustersVery successful, esp. commercially
gangbustersGANGBUSTER, a special police agent working to combat criminal gangs
gangbustersA police officer or other person who takes part in breaking up criminal gangs