Answer: suspect

AnswerCrossword Clue
SUSPECTNot to be trusted.
suspectBelieve or feel that (someone) is guilty of an illegal, dishonest, or unpleasant act, without certain proof
suspectto mistrust (to distrust (to lose belief in))
suspectHave an idea or impression of the existence, presence, or truth of (something) without certain proof
suspectDoubt the genuineness or truth of
SUSPECTAny character with a token in Clue
SUSPECTPart of a Clue accusation
SUSPECTMustard, for one
SUSPECTThe "who" of a Clue accusation, whose identity is hinted at by the three shaded answers in this quadrant
SUSPECTThe "who" of a Clue accusation, whose identity is hinted at by the three circled answers in this quadrant
SUSPECTAny character in Clue
SUSPECTDistrust
SUSPECTWhodunit figure
SUSPECTDubious.
SUSPECTDetective's quarry.
SUSPECTWhodunit character.
SUSPECTPossible culprit.
SUSPECTCharacter in a whodunit.
SUSPECTFly-by-night
SUSPECTPossible perpetrator
SUSPECTAny "Clue" character
SUSPECTLineup member
SUSPECTQuestionable
SUSPECTFishy