Answer: perkup

AnswerCrossword Clue
PERKUPCome out of a funk
PERKUPShow sudden interest
PERKUPLose the blues
PERKUPCome to life
PERKUPBrighten
PERKUPFreshen.
PERKUPRefresh
PERKUPOpposite of "nod off"
PERKUPGet excited
PERKUPEnliven
PERKUPBecome attentive