Answer: sure

AnswerCrossword Clue
SUREBeyond question
SURECasual affirmative
SUREAlways effective
SURE"Yeah, right"
SURE"Why not"
SURECertain
SUREConvinced
SUREKind of bet or thing
SURE"Of course!"
SURE"You bet!"
SURE"Why, certainly!"
SURESuffering no doubt
SUREDetermined
SUREFree from doubt
SURE"Without a doubt"
SUREUnerring
SUREIndisputable
SURENot up in the air
SURESecret alternative
SUREWilling reply
sureas a certainty; surely
SUREWithout a doubt
SURE"Natch"
SUREConfident
SURETrustworthy
SURE..-footed
SURE"Why not?"
SURECocky
SUREOf course
SUREUnfailing
SUREArrid competitor
SURE"Certainly!"
SUREDismissive comment, when said a certain way
SUREPositive
SURE"No prob!"
SURECinched
SUREFree of doubt
SURE"Okay"
SUREFoolproof
SURE"No problem"