The most common and most likely answer to this crossword clue is the 10 letter word CANDYFLOSS
I've seen this crossword clue in The Daily Telegraph
C
A
N
D
Y
F
L
O
S
S
More clues leading to the result CANDYFLOSS
- Something insubstantial about Capp married couple succeeded attracting readers ultimately
- Sticky confection in edges of cavity? Then clean teeth!
- Scold fans rioting about end of fancy sugar
- Caught Mr and Mrs Capp with small amounts of spun sugar. This?
- Fair’s fare?
- Café regularly meeting cost to cover boy's confection
- Daughter getting into fancy cooking, losing sugary stuff
- Sugary stuff also entering unfilled cavity, clean teeth
Buddy explains!

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 CANDYFLOSS mean?
CANDYFLOSS noun- Heated sugar spun into thin threads and collected into a mass, usually on a stick.