The most common and most likely answer to this crossword clue is the 6 plus 5 letter word GOLDEN SYRUP
I've seen this crossword clue in The Guardian
G
O
L
D
E
N
S
Y
R
U
P
More clues leading to the result GOLDEN SYRUP
- Awfully ugly person hugging daughter: that’s very sweet
- Rodney plugs terrible sweetener
- Ends up overwhelmed with glory, which is very sweet
- Terribly ugly person hugging daughter; that’s sweet
- Cooking ingredient, gluey drops plastered round end of spoon?
- Blonde toupe that’s very sweet
- Sweetener for tart in bygone days presented in grand rug
Buddy explains!
The straight part
We know that "which is very sweet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case which is very sweet = golden syrup.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.