The most common and most likely answer to this crossword clue is the 8 letter word SYLLABUB
I've seen this crossword clue in The Times
S
Y
L
L
A
B
U
B
More clues leading to the result SYLLABUB
- Sweet course not finished by bishop
- Dessert course finally changed
- Short programme on British dessert dish
- Programme of course has sip of beer replacing special dish
- Dessert course cut short by bishop
- Sweet, alcoholic purchases keep party swinging
- Bishop on course that’s short and sweet
- Dessert course unfinished by bachelor
Buddy explains!

The straight part
We know that "Dessert" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dessert = syllabub.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 SYLLABUB mean?
SYLLABUB noun- A drink dating back to the 16th century consisting primarily of milk curdled with an alcoholic beverage or some acid such as lemon juice, which is usually then sweetened and spiced.
- Also everlasting syllabub or solid syllabub: a dessert pudding derived from the drink.
- Something lacking substance; something frothy, insubstantial, or lightweight.