Is it like candy between your teeth? (5)

I believe the answer is:

floss

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

'teeth?' is the definition.
(I have seen 'Clean teeth' mean 'floss' so perhaps 'teeth' could also mean 'floss')

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for floss that I've seen before include "A mass of silky fibres - dental?" , "Teeth-cleaning thread" , "Thread used for tooth-cleaning" , "Silk" , "advice of dentist?" .)

I've seen this clue in the Evening Standard.

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