Wild ostrich roaming around one landmark (8)

I believe the answer is:

historic

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'one landmark' is the definition.
(thesaurus)

I can't explain the rest of the clue.

(Other definitions for historic that I've seen before include "sort of present" , "remarkable" , "Significant" , "Memorable" , "Connecting with old times" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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