Crossword Genius

A girl to help clean your teeth? (5)

Ross

I believe the answer is:

floss

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

'clean your teeth?' is the definition.
(I've seen this before)

'a girl' is the wordplay.
I cannot quite understand how this works, but
'girl' could be 'flo' and 'flo' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

'to help' is the link.

Can you help me to learn more?

(Other definitions for floss that I've seen before include "teeth cleaner" , "advice of dentist?" , "flower in Victorian novel" , "Dental thread" , "The Mill on the - (George Eliot)" .)

I've seen this clue in the Evening Standard.
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