Shocking but in current use (8)
I believe the answer is:
electric
'shocking but in current' is the definition.
'electric' can be an answer for 'current' (synonyms). I'm not certain of the 'shocking but in' bit.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for electric that I've seen before include "Of a type of energy" , "Tense" , "Highly charged" , "Emotionally charged" , "describing power supplies?" .)