Official USPS abbreviation (3)

I believe the answer is:

ave

'official usps abbreviation' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ave that I've seen before include "Cockney's own" , "Welcome" , "Latin salutation" , "Hail in old Rome" , "Hail as to Maria" .)

I've seen this clue in the Newsday.

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