The most common and most likely answer to this crossword clue is the 7 letter word TAPIOCA
I've seen this crossword clue in The Times
T
A
P
I
O
C
A
More clues leading to the result TAPIOCA
- Sports chiefs tucking into endless snacks and some sort of pudding
- Knock one over: not exactly sweet!
- Expression of gratitude about a snap capturing ordinary pudding
- Spanish cuisine sustains one business which elevates dessert
- Sports administrators tucked into endless snacks and pudding
- Missing recipe: apricot crumble
- Pudding, alternative to pie in a covering, rolled round
- Take pies or cake — all 50% starch
- Pudding recipe leaving apricot out? Ace!
- A company one might knock back for food
Buddy explains!

The straight part
We know that "sweet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sweet = tapioca.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 TAPIOCA mean?
TAPIOCA noun- A starchy food made from the cassava plant, used in puddings.