Answer: pinkyswear

AnswerCrossword Clue
PINKYSWEARSeal the deal, kid-style
PINKYSWEARSchoolyard handshake
PINKYSWEARKids' digital deal-sealer
PINKYSWEARSchoolyard promise
PINKYSWEARUse a two-digit confirmation code?
PINKYSWEARSolemn vow, between kids
PINKYSWEARPlayground promise