Important part of Denbigh (3)

I believe the answer is:

big

'important' is the definition.
('big' can be a synonym of 'important')

'part of denbigh' is the wordplay.
'part of' says the answer is hidden in the clue.
'BIG' can be found hidden inside 'denbigh'.

(Other definitions for big that I've seen before include "oversized" , "Sizeable" , "Important" , "Circus tent" , "London bell" .)

I've seen this clue in the Evening Standard.

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