knack

bluff, feint

cheating, chicanery, cozenage, craft, cunning, deception, duplicity, fakery, jugglery, legerdemain, skulduggery (or skullduggery), subterfuge, swindling, trickery

fraud, hoax, sham, swindle

blind, front, smoke screen

affinity, bias, disposition, impulse, inclination, leaning, partiality, penchant, predilection, predisposition, proclivity, propensity, tendency, turn

ear, eye, mind, nose

feel, hang, instinct, touch, way

capability, competence, facility, proficiency, skill

capacity, potential, power

forte, specialty