Answer: fakeit

AnswerCrossword Clue
FAKEITAd lib, maybe
FAKEITAd-lib
FAKEITPretend
FAKEITLook like you know what you're doing
FAKEITLook relaxed when you're nervous, e.g.
FAKEITPut on an act
FAKEITSmile though your heart is aching, e.g.
FAKEITImprovise
FAKEITPut on a show
FAKEITTry to get by through bluffing
FAKEITAct like an expert without being one
FAKEITBluff
FAKEITBluff one's way through