Defies old boy very regularly in Norfolk town (8)

I believe the answer is:

disobeys

'defies' is the definition.
(disobey can mean to defy or ignore)

'old boy very regularly in norfolk town' is the wordplay.
'old boy' becomes 'OB' (abbreviation for a private school 'old boy').
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'in' indicates putting letters inside.
'norfolk town' becomes 'diss' (town in Norfolk).
The alternate letters of 'very' are 'ey'.
'ob'+'ey'='obey'
'obey' placed into 'diss' is 'DISOBEYS'.

I've seen this clue in The Telegraph.

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