The most common and most likely answer to this crossword clue is the 7 plus 8 letter word SURFERS PARADISE
I've seen this crossword clue in The Times
S
U
R
F
E
R
S
P
A
R
A
D
I
S
E
Buddy explains!
The straight part
We know that "Queensland suburb" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case queensland suburb = surfers paradise.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.