Venerable (6)

I think it could be either:

august

ageold

'venerable' is the definition.
(synonyms)

This is the entire clue.

(Other definitions for august that I've seen before include ". . . . . . is a Wicked Month (Edna O'Brien)" , "part of the summer" , "Eighth month" , "nomination for Strindberg" , "part of the year" .)

I've seen this clue in The Telegraph and The Wall Street Journal.

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