The most common and most likely answer to this crossword clue is the 8 letter word CELLARET
I've seen this crossword clue in The Daily Telegraph
C
E
L
L
A
R
E
T
More clues leading to the result CELLARET
- Red wine the Spanish stocked … here?
- English student fills up Bordeaux in wine cabinet
- Wine bottles outside in external storage unit
- Trouble taken initially to store the Spanish litres — in this cupboard?
- The Spanish red wine being handed around — coming from this?
- Keeping the Spanish wine over the sideboard
- Wine bottles — seal regularly missing from sideboard
Buddy explains!

The straight part
We know that "cupboard" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cupboard = cellaret.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 CELLARET mean?
CELLARET noun- A deep, often metal-lined drawer in a sideboard used for storing wines and liquors.