Almost everyone can be an innkeeper (8)

I believe the answer is:

publican

I'm a little stuck... Click here to teach me more about this clue!

'innkeeper' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for publican that I've seen before include "Old tax-collector" , "Former tax collector" , "Bar licensee" , "Bar owner" , "one's seen in the bar" .)

I've seen this clue in the Sydney Morning Herald.

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