Charmingly old-fashioned (6)
I believe the answer is:
quaint
'charmingly old-fashioned' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for quaint that I've seen before include "Olde worlde" , "Curious" , "Picturesquely old-fashioned" , "Attractive, in an old-fashioned way" , "'Olde-worlde'" .)