The most common and most likely answer to this crossword clue is the 7 letter word PUDDING
I've seen this crossword clue in The Guardian
P
U
D
D
I
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G
More clues leading to the result PUDDING
- Boxer taking in r-row leading to afters?
- Dullard in squat almost stifling noise
- Of course, it’s sweet
- Sweet dog swallowing date and half of meal
- Sweet prince is promising bachelor no more
- See 22 down
- Drop answer in superfluous material for university course
- Fool perhaps putting hand in front of tailless dog
- Club one may join if 12 26 treatment fails?
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 = pudding.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 PUDDING mean?
PUDDING noun- Any of various dishes, sweet or savoury, prepared by boiling or steaming, or from batter.
- A type of cake or dessert cooked usually by boiling or steaming.
- A type of dessert that has a texture similar to custard or mousse but using some kind of starch as the thickening agent.
- Dessert; the dessert course of a meal.
- A sausage made primarily from blood.
- An overweight person.
- Entrails.
- Any food or victuals.
- A piece of good fortune.