Pub brewing tea, as is natural (6)
I believe the answer is:
innate
'is natural' is the definition.
(similar in meaning)
'pub brewing tea' is the wordplay.
'pub' becomes 'inn' (an inn is a type of pub).
'brewing' is an anagram indicator.
'tea' anagrammed gives 'ate'.
'inn'+'ate'='INNATE'
'as' acts as a link.
(Other definitions for innate that I've seen before include "Inborn, natural to (6)" , "Born" , "Inherent or inborn" , "'Inborn, not learned (6)'" , "Congenital" .)