Answer: upstart

AnswerCrossword Clue
UPSTARTWould-be gentleman.
upstartto start up suddenly
upstartderogatory. A person who has risen suddenly to wealth or high position, esp. one who behaves arrogantly
UPSTARTArrive
UPSTARTSudden, surprising success
UPSTARTOne suddenly raised to importance
UPSTARTPresumptuous one
UPSTARTWhippersnapper
UPSTARTSuddenly rich sort
UPSTARTArriviste
UPSTARTSociety crasher
UPSTARTSurprise challenger
UPSTARTBrash one
UPSTARTParvenu
UPSTARTA cheeky success.
UPSTARTNouveau riche.
UPSTARTMember of the nouveau riche.
UPSTARTSnob.
UPSTARTParvenu.
UPSTARTEarly riser
UPSTARTJohnny-come-lately
UPSTARTSudden, suprising success
UPSTARTPretentious newcomer
UPSTARTNouveau riche
UPSTARTPresumptuous success story