The most common and most likely answer to this crossword clue is the 7 letter word CANDIED
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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 = candied.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 CANDIED mean?
CANDIED adjective- Coated or encrusted with sugar
- Preserved in sugar or syrup by baking till it becomes translucent
- Pleasing, flattering.
- To cook in, or coat with, sugar syrup.
- To have sugar crystals form in or on.
- To be formed into candy; to solidify in a candylike form or mass.