Only just see after pub (6)
I believe the answer is:
barely
'only just' is the definition.
(I've seen this before)
'see after pub' is the wordplay.
'see' becomes 'Ely' (see is a place with a cathedral - e.g. Ely).
'after' says to put letters next to each other.
'pub' becomes 'bar' (both are drinking establishments).
'ely' put after 'bar' is 'BARELY'.
(Other definitions for barely that I've seen before include "how babies are born?" , "as Godiva rode?" , "just a short while before" , "how streakers like to act?" , "Not quite" .)