The most common and most likely answer to this crossword clue is the 9 letter word DOUGHNUTS
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More clues leading to the result DOUGHNUTS
Buddy explains!

The straight part
We know that "sweets" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sweets = doughnuts.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 DOUGHNUTS mean?
DOUGHNUTS noun- A deep-fried piece of dough or batter, commonly of a toroidal (a ring doughnut) shape, often mixed with various sweeteners and flavourings; or flattened sphere (a filled doughnut) shape filled with jam, custard or cream.
- Anything in the shape of a torus.
- A peel-out or skid mark in the shape of a circle; a 360-degree skid.
- A spare car tyre, usually stored in the boot, that is smaller than a full-sized tyre and is only intended for temporary use.
- A vulva.
- (colloquial) A foolish or stupid person.