See under counter? Only just (6)
I believe the answer is:
barely
'only just' is the definition.
'see under counter?' is the wordplay.
'see' becomes 'ely' (example where cathedral located in diocese).
'under' is a charade indicator (letters next to each other).
'counter?' becomes 'bar' (bar is a kind of counter).
'ely' put after 'bar' is 'BARELY'.
(Other definitions for barely that I've seen before include "Just about or scantily" , "as Godiva rode?" , "Not quite" , "how babies are born?" , "Just about, nothing to spare" .)