Little information about vintage (6)
I believe the answer is:
golden
'little' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I don't see?
'information about vintage' is the wordplay.
'information' becomes 'gen' (gen is a kind of information).
'about' is an insertion indicator.
'vintage' becomes 'old' (I've seen this before).
'gen' placed around 'old' is 'GOLDEN'.
(Other definitions for golden that I've seen before include "Brilliant" , "Pale treacle" , "Excellent" , "Autumnal flower" , "'The silver apples of the moon / the . . . . . . apples of the sun' (Yeats)" .)