Intestine part (5)
I believe the answer is:
colon
'intestine part' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for colon that I've seen before include "Stop - part of intestine" , ": - bit of the gut" , "that may cut sentence" , "City at the Caribbean entrance to the Panama Canal" , "Stop (on the inside!)" .)