Had a meal at the pub, as is only natural (6)
I believe the answer is:
innate
'natural' is the definition.
(I know that natural can be written as innate)
'had a meal at the pub' is the wordplay.
'had a meal' becomes 'ate' (ate a meal).
'at' means one lot of letters go next to another (I've seen this in other clues).
'the pub' becomes 'inn' (an inn is a type of pub).
'ate' put after 'inn' is 'INNATE'.
'as is only' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for innate that I've seen before include "Congenital" , "Born" , "Inborn, natural to (6)" , "native" , "'Inborn, not learned (6)'" .)