The most common and most likely answer to this crossword clue is the 7 plus 10 letter word GROCERS APOSTROPHE
I've seen this crossword clue in Financial Times
G
R
O
C
E
R
S
A
P
O
S
T
R
O
P
H
E
Buddy explains!
The straight part
We know that "Apple’s one example of" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case apple’s one example of = grocers apostrophe.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.