A girl to help clean your teeth? (5)
I believe the answer is:
floss
'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)" .)