The most common and most likely answer to this crossword clue is the 7 letter word BELOVED
I've seen this crossword clue in The Guardian
B
E
L
O
V
E
D
More clues leading to the result BELOVED
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 = beloved.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 BELOVED mean?
BELOVED verb- To please.
- To be pleased with; like.
- To love.
- Someone who is loved; something that is loved.
- Much loved, dearly loved.