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Routinely
concerned
with
all
one’s
toes?
(5)
Routinely concerned with all one’s toes? (5)
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The definition is at the beginning of the clue.
How the clue works
Right, so Routinely is the definition here — that's just another way of saying often or repeatedly. For the wordplay, they've bolted together OF, meaning "concerned with", and TEN, since ten's the number of toes you've got if you count "all one's toes" — stick OF and TEN together and there's your answer.