Guts shown by injured cavers with current coming in (7)
I believe the answer is:
viscera
'guts' is the definition.
(viscera are one's internal organs)
'injured cavers with current coming in' is the wordplay.
'injured' indicates anagramming the letters.
'with current' becomes 'i' (symbol for electric current. I am not sure about the 'with' bit.).
'coming in' indicates putting letters inside.
'cavers' is an anagram of 'vscera'.
'vscera' placed around 'i' is 'VISCERA'.
'shown by' acts as a link.
(Other definitions for viscera that I've seen before include "organs inside" , "Internal organs, intestines" , "Guts" , "Abdominal organs -- cars vie (anag)" , "Entrails -- CIS rave (anag)" .)