Crossword Genius

Sugary stuff also entering unfilled cavity, clean teeth (10)

Ross

I believe the answer is:

candyfloss

I'm a little stuck... Click here to teach me more about this clue!

'sugary stuff' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'also entering unfilled cavity clean teeth' is the wordplay.
'also' becomes 'and' (both can mean in addition).
'entering' indicates putting letters inside.
'unfilled' means to remove the middle letters.
'clean teeth' becomes 'floss' (I've seen this before).
'cavity' with its middle taken out is 'cy'.
'and' placed within 'cy' is 'candy'.
'candy'+'floss'='CANDYFLOSS'

Can you help me to learn more?

(Other definitions for candyfloss that I've seen before include "Spun-sugar confection" , "Light, fluffy confection of spun sugar" , "Fairground's pink confection" .)

I've seen this clue in The Telegraph.
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