11 across
It
requires
brushing
hale
harlot
off
(4,6)
It requires brushing hale harlot off (4,6)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
It requires brushing is your definition — keeping on top of it is what all that teeth-cleaning is for. Then "off" signals an anagram, and if you shuffle the letters of hale harlot around, they rearrange neatly to give you the answer.