Some electricity through heart shocked part of body (7)
I believe the answer is:
trachea
'part of body' is the definition.
('trachea' is part of 'body')
'some electricity through heart shocked' is the wordplay.
'some electricity' becomes 'ac' (alternating current).
'through' indicates putting letters inside (I've seen this in other clues).
'shocked' is an anagram indicator.
'heart' is an anagram of 'trhea'.
'ac' going within 'trhea' is 'TRACHEA'.
(Other definitions for trachea that I've seen before include "air passage" , "where air passes" , "pipe" , "The formal windpipe" , "Breathing tube" .)