The most common and most likely answer to this crossword clue is the 7 letter word CANNOLI
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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 = cannoli.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 CANNOLI mean?
CANNOLI noun- (chiefly in the plural) A tube of fried pastry, typical of Sicily, filled with ricotta or similar cream cheese, and flavorings, eaten as a dessert.