Some intuitive characters regularly taking classes (7)

I believe the answer is:

tuition

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'some intuitive characters regularly taking classes' is the definition.
I can't tell whether this definition defines the answer.

'some intuitive characters regularly' is the wordplay.
'some' indicates the central letters.
'characters regularly' becomes 'on' (I can't explain this - if you can you should believe this answer much more).
The centre of 'intuitive' is 'tuiti'.
'tuiti'+'on'='TUITION'

Can you help me to learn more?

(Other definitions for tuition that I've seen before include "Schooling" , "Teaching, often one-to-one" , "Lessons" , "Training" , "Personal coaching" .)

I've seen this clue in The Daily Express.

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