Power cut without resistance giving shock (7)
I believe the answer is:
outrage
'shock' is the definition.
(I've seen this before)
'power cut without resistance' is the wordplay.
'power cut' becomes 'outage' (I've seen this before).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'resistance' becomes 'r' (abbreviation).
'outage' enclosing 'r' is 'OUTRAGE'.
'giving' is the link.
(Other definitions for outrage that I've seen before include "Violate" , "Great anger" , "Shocking event" , "scandalous!" , "Atrocious act" .)