Good wine substitute?
I believe the answer is:
re-serve
This might be a double definition.
'good wine' is the first definition.
The definition suggests a verb in its base form which matches the answer.
'substitute?' is the second definition.
(I've seen this before)
(Other definitions for re-serve that I've seen before include "Lack of openness" , "Book - spare player" , "Keep for someone -- spare bod" , "Severer (anag.)" , "Put aside for special use" .)