Very behindhand after electric current cut off (7)
I believe the answer is:
isolate
'cut off' is the definition.
(both can mean to separate from others)
'very behindhand after electric current' is the wordplay.
'very' becomes 'so' (both can mean 'extremely').
'behindhand' becomes 'late' (I've seen this before).
'after' says to put letters next to each other.
'electric current' becomes 'I' (physics symbol).
'so'+'late'='solate'
'solate' after 'i' is 'ISOLATE'.
(Other definitions for isolate that I've seen before include "Detach" , "Place apart, away from others" , "Seclude" , "Maroon" , "Strand" .)