Answer: suss

AnswerCrossword Clue
SUSSPuzzle (out)
SUSSFigure (out)
SUSSFigure (out), in slang
SUSSDope (out)
SUSSPuzzle (out), in slang
SUSSFigure (out), slangily
SUSSFigure (out), in British slang
SUSSFigure, in British slang
SUSS... out (understand)
SUSSWork (out)
SUSSRealise, with "out"
SUSS-- out (investigate, to a Brit)
SUSSMake (out)
sussto investigate or figure out (usually fol. by out)
sussto figure out