The most common and most likely answer to this crossword clue is the 7 plus 7 letter word LIMITED EDITION
I've seen this crossword clue in The Sunday Telegraph
L
I
M
I
T
E
D
E
D
I
T
I
O
N
Buddy explains!
The straight part
We know that "It’s bound to be available for a few" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it’s bound to be available for a few = limited edition.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.