Answer:

slyest

AnswerCrossword Clue
SLYESTMost cunning
SLYESTMost foxy
SLYESTMaximally wily
SLYESTLeast candid
SLYESTLeast ingenuous
SLYESTMost foxlike
SLYESTMaximally sharp
SLYESTLeast open
SLYESTMost like Iago
SLYESTSuperlatively slick
SLYESTMost vulpine