Inborn, instinctive (6)
I believe the answer is:
innate
This clue is a double definition.
'inborn' is the first definition.
(I know that inborn can be written as innate)
'instinctive' is the second definition.
(thesaurus)
(Other definitions for innate that I've seen before include "Congenital" , "Bred in the bone, one might say" , "not needing to be taught" , "instinctive ..." , "Present from birth" .)