Live wire in generator? (6)
I believe the answer is:
dynamo
This clue is a double definition.
'live wire' is the first definition.
(both can mean an energetic person)
'generator?' is the second definition.
(I know that dynamo is a type of generator)
'in' acts as a link.
(Other definitions for dynamo that I've seen before include "Juice supplier" , "Forceful person" , "Type of electrical generator" , "It generates electricity" , "Generator of electricity (eg, on bicycle)" .)