Electronic music brings sleepy state (6)
I believe the answer is:
trance
'state' is the definition.
(trance is a kind of state)
'electronic music brings sleepy' is the wordplay.
I cannot really see how this works, but
'electronic' could be 'e' (as in e-mail or e-books) and 'e' is found in the answer.
'music' could be 'tra' (I've seen this in another clue) and 'tra' is found in the answer.
The remaining letters 'nc' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for trance that I've seen before include "Canter into suspended animation" , "Ecstasy" , "Reverie" , "Catalepsy" , "Canter in dream-state" .)