Instinctive (feeling) (3)
I believe the answer is:
gut
'instinctive feeling' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gut that I've seen before include "Remove innards from" , "Intestine, or the stomach" , "good German" , "Food processor" , "Thread made from animal intestines" .)