Last of the vintage in the shade (4)
I believe the answer is:
ecru
'shade' is the definition.
(colour)
'last of the vintage' is the wordplay.
'last of' says to take the final letters.
'vintage' becomes 'cru' (e.g. grand cru).
The final letter of 'the' is 'e'.
'e'+'cru'='ECRU'
'in the' acts as a link.
(Other definitions for ecru that I've seen before include "Stange cure for a colour" , "not whiter than white" , "Natural stuff" , "Find a cure, strangely, in the colour" , "Light fawn colour" .)