Full of life (5)
'full of life' is the definition.
(synonyms)
This is all the clue.
(Other definitions for vital that I've seen before include "Crucial" , "Absolutely necessary or life-giving" , "Essential; lively" , "Desperately important" , "Energetic - displaying life" .)
(Other definitions for zippy that I've seen before include "Bright, lively" , "Energetic" , "Full of energy" , "Quick" , "Lively (colloq.)" .)