It's natural to find a pub, having had a meal (6)
I believe the answer is:
innate
'it's natural to' is the definition.
(thesaurus)
'a pub having had a meal' is the wordplay.
'a pub' becomes 'inn' (an inn is a type of pub).
'having' means one lot of letters go next to another.
'had a meal' becomes 'ate' (ate a meal).
'inn'+'ate'='INNATE'
'find' acts as a link.
(Other definitions for innate that I've seen before include "Have tea in inn - it's natural" , "Bred in the bone, one might say" , "Inherent, natural" , "Inborn, natural to (6)" , "Inborn in neat way" .)