It's natural possibly to eat at the pub (6)
I believe the answer is:
innate
'it's natural' is the definition.
(similar in meaning)
'to eat at the pub' is the wordplay.
'to eat' becomes 'ate' (I am not sure about this - if you are sure you should believe this answer much more).
'at' says to put letters next to each other (I've seen this in other clues).
'the pub' becomes 'inn' (an inn is a type of pub).
'ate' put after 'inn' is 'INNATE'.
'possibly' acts as a link.
Can you help me to learn more?
(Other definitions for innate that I've seen before include "Inherent, natural" , "'Inborn, not learned (6)'" , "Bred in the bone, one might say" , "Born" , "Inborn in neat way" .)