Aware of our originally visiting tavern (2,2)
I believe the answer is:
in on
'aware of' is the definition.
(you can be 'in on' a particular plan or scheme)
'our originally visiting tavern' is the wordplay.
'originally' says to take the initial letters.
'visiting' means one lot of letters goes inside another.
'tavern' becomes 'inn' (I've seen this before).
The initial letter of 'our' is 'o'.
'o' put inside 'inn' is 'IN ON'.
(Other definitions for in on that I've seen before include "Wise to" , "Sharing with" , "Participating in - knowing about" , "Aware of secret" , "Aware of - being part of" .)