Is not guilty of selling drink around capital (8)

I believe the answer is:

innocent

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'is not guilty' is the definition.
('innocent' is the opposite to 'guilty')

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for innocent that I've seen before include "otherworldly?" , "Virgin" , "Naive or not guilty" , "Free from sin" , "Without blame or without guile" .)

I've seen this clue in The Irish Times.

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