Deceive

12 clues
Dupe
Fool
Gull
Cheat
Trick
Take in
Mislead
Lead on
Hoodwink
Double-deal
What mountebanks do
Intentionally mislead
Similar answers:
Abideceptivepitch
Abovedeck
Abthedeck
Addedadeck
Adecadeback
Adeckwithjokers
Affairedecur
Aidedecamp
Aidedechamp
Aidedecramp
Aidesdecamp
Allhandsondeck
Allhondeck
Anoutsidechance
Appendectomy
Appledecider
Areyoudec
Areyoudecent
Armydecorations
Artdeco