The most common and most likely answer to this crossword clue is the 9 letter word VENERABLE
V
E
N
E
R
A
B
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The straight part
We know that "August" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case august = venerable.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does VENERABLE mean?
VENERABLE adjective- Commanding respect because of age, dignity, character or position.
- Worthy of reverence.
- Ancient, antiquated or archaic.
- Made sacred especially by religious or historical association.
- Giving an impression of aged goodness and benevolence.