The most common and most likely answer to this crossword clue is the 5 letter word CANDY
I've seen this crossword clue in The Sunday Telegraph
C
A
N
D
Y
More clues leading to the result CANDY
- Sweets in tin daddy emptied
- Sweet tin disappointingly empty
- Sweets in aspic, and yucky!
- All but the filling in crunchy sweets
- Extremes of creamy New York confectionery
- Sweet tin deliberately emptied
- What’s left, if I leave cold sweet?
- Charlie with last of sticky sweets
- Sweet, country’s borders?
- Sweets also found in outskirts of city
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 = candy.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 CANDY mean?
CANDY noun- Edible, sweet-tasting confectionery containing sugar, or sometimes artificial sweeteners, and often flavored with fruit, chocolate, nuts, herbs and spices, or artificial flavors.
- A piece of confectionery of this kind.
- (slang, chiefly US) crack cocaine.
- 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.
- A unit of mass used in southern India, equal to twenty maunds, roughly equal to 500 pounds avoirdupois but varying locally.