Opening new tavern, one invited in (3,4)

I believe the answer is:

air vent

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'invited in' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'opening new tavern one' is the wordplay.
'opening' is an insertion indicator (some letters open a gap in others).
'new' is an anagram indicator.
'one' becomes 'I' (Roman numeral).
'tavern' anagrammed gives 'arvent'.
'arvent' going around 'i' is 'AIR VENT'.

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I've seen this clue in The Guardian.

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