The most common and most likely answer to this crossword clue is the 10 letter word UNSTOPPING
I've seen this crossword clue in The Daily Telegraph
U
N
S
T
O
P
P
I
N
G
More clues leading to the result UNSTOPPING
Buddy explains!

The straight part
We know that "opening to provide wine" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case opening to provide wine = unstopping.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does UNSTOPPING mean?
UNSTOPPING verb- To remove a stoppage; to clear a blockage.
- To unplug or uncork a container.
- To draw out the stops of (an organ).