Olde-worlde, but not quite antique strangely (6)
I believe the answer is:
quaint
'olde-worlde' is the definition.
(I've seen this before)
'not quite antique strangely' is the wordplay.
'not quite' means to remove the last letter.
'strangely' is an anagram indicator.
'antique' with its final letter removed is 'antiqu'.
'antiqu' anagrammed gives 'QUAINT'.
'but' is the link.
(Other definitions for quaint that I've seen before include "Olde worlde" , "Picturesque" , "Twee" , "Charmingly odd, old" , "Attractively unusual or old-fashioned" .)