The most common and most likely answer to this crossword clue is the 5 letter word RORTY
R
O
R
T
Y
More clues leading to the result RORTY
Buddy explains!
The straight part
We know that "Lively Australian" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lively australian = rorty.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 RORTY mean?
RORTY adjective- Boisterous, rowdy, saucy, dissipated, or risqué.