Answer: sleuths

AnswerCrossword Clue
SLEUTHSFollows a clue.
sleuthsSLEUTH, to act as a detective
sleuthsdetective
SLEUTHSHolmes and Chan, e.g.
SLEUTHSMr. and Mrs. North, e.g.
SLEUTHSCase workers
SLEUTHSSpade and Queen, e.g.
SLEUTHSHammer and Spade
SLEUTHSThey follow trails
SLEUTHSHolmes and Chan, for two
SLEUTHSPrivate eyes
SLEUTHSVance and Holmes
SLEUTHSGumshoes.
SLEUTHSMystery crackers
SLEUTHSSpade and Marlowe.
SLEUTHSSpade, Chan, et al.
SLEUTHSCase workers?
SLEUTHSWhodunit heroes
SLEUTHSGumshoes
SLEUTHSMagnum et al.
SLEUTHSSpade and Hammer
SLEUTHSDetectives
SLEUTHSInvestigators
SLEUTHSClue interpreters
SLEUTHSMoto and Chan
SLEUTHSMystery men?