Live wire turning up in so many devices (6)
I believe the answer is:
dynamo
'live wire' is the definition.
(both can mean an energetic person)
'turning up in so many devices' is the wordplay.
'turning up' says the letters should be written backwards.
'in' indicates a hidden word.
'omanyd' is hidden in the letters of 'so many devices'.
'omanyd' back-to-front is 'DYNAMO'.
(Other definitions for dynamo that I've seen before include "Generator of electricity (eg, on bicycle)" , "It generates electricity" , "Electricity generator or vigorous person" , "Tirelessly energetic type" , "something electrifying" .)